After Transmigrating into an ABO World with My Nemesis (BL) - Chapter 1

“Say that again… I’m a what?” Jiang Zhou stared wide-eyed at his roommate.

“…You’re an Omega.”

“A… what-mega?”

“An Omega.” His roommate gave a stiff smile, explaining things to a Jiang Zhou who seemed to have suddenly lost his mind. “A gender. That is your gender.”

Jiang Zhou pointed to himself. “Omega? Me?”

“Yes.”

Jiang Zhou’s eyes went round. He kept pointing at himself. “I’m an Omega?”

“…Yes.”

“The Omega is me?”

“…”

Is this guy an AI bot or something?!

The roommate was already numb from Jiang Zhou’s sudden mental breakdown. He repeated himself expressionlessly: “Yes. You. It’s you. You are a genuine, certified Omega. You have glands on the back of your neck, you emit pheromones, you have a Heat once every three months, and you can be marked by an Alpha injecting their pheromones into you.”

Jiang Zhou was completely lost. “What’s a Heat?”

“The polite, reserved version of ‘going into estrus’.”

“Oh… like in Animal Planet?” Jiang Zhou tried to wrap his head around it. “Spring has arrived, and it’s once again the season for animals to mat—… that kind of thing?”

The roommate said euphemistically, “We humans don’t usually call it ‘mating’.”

“I know! We humans usually call it—”

Before he could finish the sentence, the roommate cut him off through gritted teeth. “Jiang Zhou! Humans are supposed to be more subtle!”

Are they?

You guys literally have ‘mating seasons’ now—how is that subtle?

Jiang Zhou’s worldview suffered a massive impact. He wore a look of utter disgust.

“…K. Fine,” he said.

Roommate: “…”

The roommate took a deep breath and continued to explain, “Anyway, when an Omega’s Heat arrives, they… crave Alphas.”

“Crave them how?” Jiang Zhou asked with a face full of genuine curiosity.

Roommate: “…”

The roommate didn’t know if he was truly stupid or just acting. He opened his mouth, but the words wouldn’t come out.

“Can’t say?” Jiang Zhou pressed.

The roommate’s silence was deafening. After a long while, he finally spoke: “…I suggest you ask the Alpha who marks you in the future.”

Jiang Zhou looked repulsed. “I’m never letting an Alpha mark me.”

“You can use suppressants, but using too many will damage your body.”

Jiang Zhou let out a gloomy “oh.” His brows were furrowed tight; he looked like someone whose reality had been shattered but was desperately trying to find a loophole to prove it was all a lie, only to realize the situation was so damn ridiculous there was no place to start.

His eyebrows were practically tied in a knot. After agonizing for a while, he asked, “But what’s the difference between ‘marking’ and a puppy peeing to mark its territory?”

Roommate: “…”

Realizing it was impossible to get through to him, the roommate finally gave up. He said numbly, “The difference is that we are humans, and marking isn’t peeing.”

“I mean, sure, I get that, but…” But isn’t it all just leaving your scent on someone else’s turf to claim it?

Halfway through his sentence, Jiang Zhou caught his roommate’s murderous glare. He immediately shut his mouth and offered a compliant smile, looking like a cat with its claws tucked in—docile and honest. “Right! We humans are highly intelligent beings who can control our desires! ABO is truly a giant leap for biological evolution… Hey, do evolved animals have ABO genders too?”

The roommate took a deep breath, looking like he was about to explode—

Jiang Zhou blinked at him, asking out of curiosity once more: “Do they?”

Jiang Zhou was handsome—a very clean kind of handsome. He didn’t look delicate; he was filled with a refreshing, vibrant boyishness, as if he carried a source of boundless vitality.

His eyes were particularly striking—large, well-shaped, with pupils the color of golden glass. They were clear and translucent. When those eyes looked straight at you, it was hard to resist.

“…No.” The roommate finally surrendered to that face and answered one last time.

“Then Alphas—”

But no matter how good a face looks, it can’t save you from this kind of torture!

The roommate finally lost his patience with the chatter and curiosity. He flipped a copy of the New Student Manual for ABO Physiological Knowledge and threw it at him.

To be honest, these manuals in university were usually just a formality. Nowadays, most people differentiated between ages 14 and 16; they already knew what they needed to know. No one was like Jiang Zhou, who knew absolutely nothing.

However, it was precisely to prevent cases like Jiang Zhou—people who were completely ignorant of ABO physiology—that the school had implemented these measures.

After all, eighteen or nineteen-year-olds who had just escaped the high-intensity management of high school were unpredictable. Anything could happen.

To avoid unnecessary “accidents,” every freshman received a manual, and the school organized specialized seminars. There was even a public elective course on ABO Physiological Identification and Safety.

It was during that very class that Jiang Zhou realized he had transmigrated.

Yes, he wasn’t from this world at all. His world only had two genders: male and female. It wasn’t like this magical world where there were actually six!

Jiang Zhou’s worldview was in pieces!

He clearly remembered that his class this morning was supposed to be Ideology and the Rule of Law. He had even put the book on his desk last night.

He had stayed up late playing on his phone, and with an 8:00 AM class today, he was tired as hell. He was in a daze until he sat down in the classroom and realized the book in his hand had changed from Ideology, Morality, and the Rule of Law to ABO Physiological Identification and Safety.

When he flipped through it, the content looked legitimate, if a bit nonsensical.

He thought his deskmate was playing a prank on him. He asked his deskmate (who was also his roommate in this world) with a face full of confusion: “What the hell is this?! You wrote a whole book just to mess with me?!”

His deskmate was also confused: “What are you doing? These are the textbooks we just got!”

Jiang Zhou: “???”

After two full periods and a break spent constantly verifying things, Jiang Zhou finally accepted the fact that he had transmigrated.

Into a parallel world.

His classmates were the same, his roommates were the same, the school was the same, and he was still himself.

But… he had come to a world with six genders.

Even the dorm buildings were divided into six zones.

And he had become an Omega.

“This is too scary, too surreal.” Jiang Zhou flipped through the manual his roommate had tossed at him. After reading the introduction to Omega physiology, he felt like he was going to pass out. He muttered vacantly, “Is it because I ‘disliked’ that comment yesterday…?”

Last night, after gaming, Jiang Zhou had been browsing a forum and saw a strange comment.

The gist of it was that “arch-nemeses could never become lovers.” Before he could even agree with all his heart, he caught the very last sentence of the post: Therefore, arch-nemeses are lovers.

Jiang Zhou: “…”

Insane!

How did they reach that conclusion!

How could enemies ever become lovers!

Jiang Zhou had angrily hit the “dislike” button and went to sleep in a huff.

He woke up and—hey presto—he’d transmigrated.

If he could turn back time, he definitely wouldn’t have disliked that comment.

Maybe that really was the cause?

After all, it was the last thing he did before transmigrating.

He should have just ignored it. In any case, there was no way he and his childhood friend/arch-nemesis Cheng Bing would ever become lovers.

Even if everyone else in the world died! Every last person! If only he and Cheng Bing were left!

He and Cheng Bing would be—

ENEMIES! UNTIL! DEATH!

BANG!

The dorm door was kicked open. A tall, dark-skinned guy braced himself against the bouncing door, shouting breathlessly: “Jiang Zhou! Is Jiang Zhou here?! Your Cheng Bing is having a sudden Rut! He’s looking for you right now!”

Jiang Zhou: “?”

Jiang Zhou, who had just been making a vow of hatred in his head, stared blankly. “Huh?”

Whose… whose what?

The weather was clear, and the ornamental trees along the road were lush and green. Golden sunlight filtered through the gaps in the leaves, scattering swaying spots of light.

Four feet scrambled over the patches of light on the asphalt, hurrying toward the infirmary. Along the way, an Omega’s panicked and disbelieving voice rang out: “You’re saying… Cheng Bing and I are a couple right now?!”

The dark-skinned guy didn’t confirm it immediately. He seemed to remember something, and a complicated expression crossed his face. “…It’s hard to say.”

Jiang Zhou: “?”

Jiang Zhou became even more confused. “Either we are or we aren’t. What does ‘hard to say’ mean?”

“Jiang Zhou, do you have amnesia?” The guy didn’t answer, but instead asked curiously, “It feels like you don’t remember anything at all.”

Jiang Zhou wasn’t in the mood to chat about parallel universes. Who would believe him?

He waved it off. “That’s not important. Just assume I slept until my brain rotted. So, what’s the deal with Cheng Bing’s ‘cold’ period?”

Jiang Zhou stumbled, unable to remember the exact term. He just made one up; the meaning was close enough. “Cold period? What’s the situation? A new strain of the flu?”

Blackie: “…”

Blackie: “It’s a Rut, not a virus. You can think of it as a period of agitation and depression caused by a spike in Alpha pheromone levels.”

They become emotionally sensitive, highly aggressive, possessive, and yet… very fragile.

If the Omega they like says they hate them, they might actually curl up and die of sadness.

“Oh, I see.” Jiang Zhou was still a bit hazy. He had just learned about Omega physiology and hadn’t gotten to Alphas yet. However, he guessed that a Rut was probably similar to a Heat—if left alone, it could lead to serious consequences or even death. Although he and Cheng Bing didn’t get along, he wasn’t about to leave him to die. But Jiang Zhou was still puzzled. “He’s in a Rut, so why is he looking for me?”

The guy gave Jiang Zhou a strange look and muttered, “He really has slept himself stupid. How can you not remember even this?”

Jiang Zhou: “?”

Wait… am I supposed to remember?

Is this something important?

Seeing Jiang Zhou’s wide-eyed, confused face—the look of someone truly out of the loop—the guy had no choice but to explain: “Because neither of you can use suppressants to alleviate your Heats or Ruts. You can only use… each other.”

Only use each other?

Use how? Which kind of ‘use’?!

Jiang Zhou, who had just learned what a Heat entails from the book, felt his face burn instantly. He felt like he was about to explode.

Does that even sound right?!

Whether it sounded right or not, Jiang Zhou had already arrived at the infirmary door.

The helpful classmate dropped him off, said goodbye, and left—not before winking and wishing him a “happy night.”

Jiang Zhou: “…”

Considering the guy had led the way, Jiang Zhou suppressed the urge to deck him.

“Student Jiang Zhou, right?” A Beta woman in a white coat and glasses saw him and nodded. “Student Cheng Bing is in the isolation room. Take a seat here first.”

“Okay.” He had been dazed the whole way, and he was still dazed now. When told to sit, he sat down like a statue.

Two minutes later, the school doctor returned with a thin black collar.

Jiang Zhou looked at it curiously.

The doctor explained, “This is a neck collar. Wearing it will prevent your pheromone levels from spiking, keeping you from losing control, and preventing the Alpha from losing control as well. If the Alpha’s pheromone concentration exceeds the danger threshold, the collar will emit a warning. If it warns more than three times, an alert will be sent to us, and we will arrive immediately to ensure you aren’t harmed.”

Tch.

Could that weak, high-maintenance bookworm Cheng Bing actually hurt me?

Jiang Zhou was utterly dismissive.

But he decided to respect the weird rules of this world anyway.

Jiang Zhou put on a “good boy” act and said, “I understand. Thank you.”

Seeing that he seemed sensible, the doctor nodded in satisfaction, handed him the collar, and said softly, “Put it on. I’ll take you over.”

Jiang Zhou obediently agreed. He took the black Omega collar and began to examine it.

It was about as thick as a pinky finger, smooth all over, with a silver metal piece the size of a knuckle in the center.

He guessed the metal piece was supposed to press against the back of his neck. After all, that’s where the… uh, glands were.

Jiang Zhou tried putting the collar on and buckled it. It felt as if two tiny needles had pricked his skin at the nape of his neck. It was uncomfortable but not overly painful; he could handle it.

Soon, Jiang Zhou was led to the second-floor isolation room. At the door, the doctor gave him one last serious warning: “The collar is for your safety. During the soothing process, you must absolutely NOT take it off. Even if the Alpha tries to coax you into removing it, do not do it.”

Her cautious tone made it sound like Jiang Zhou wasn’t going in to soothe an Alpha, but to defuse a bomb.

Jiang Zhou nodded obediently, but he was skeptical.

He had never lost a fight to Cheng Bing before. (Of course, he hadn’t exactly won either, but that wasn’t the point.)

No matter how mysterious this pheromone stuff was, it couldn’t be so magical that it would stop him from being able to throw a punch, right?

With that mindset, after the doctor left, Jiang Zhou didn’t hesitate. He swung the door to the isolation room open with zero flair.

And then he understood why the doctor had repeatedly warned him to be careful about getting hurt.

Thump-thump!

His blood rushed, his heart clenched, and the pheromones inside his body were instantly awakened, beginning to boil and surge.

The second he stepped in, the heavy Alpha pheromones that had been suppressed for so long hit Jiang Zhou like a sudden flood from a broken dam. He was completely caught off guard; his legs turned to jelly instantly, and he nearly collapsed.

The Alpha pheromones were overwhelming, filling every inch of the sealed room. The concentration was so high it felt like a thick, viscous gel—reaching out like claws to swallow Jiang Zhou whole.

Jiang Zhou began to tremble. This was his first time experiencing the sheer power of pheromones. Having no mental preparation, the stimulation was nearly devastating—irresistible and striking him directly in the soul.

It was hard to describe the feeling. He felt like pheromones… weren’t even a scent, but a form of synesthesia.

In a daze, Jiang Zhou felt like he was seeing fresh snow falling on cedar trees. He was standing in a forest clearing, shrouded by a chilling breath. Then, he felt as if he were standing by the sea, stepping on jagged, dead coral reefs. The moment he entered the room, a surging, damp tide slammed into him, dragging him into the deep ocean.

It was almost enough to make him drown.

Jiang Zhou’s body temperature began to rise, his cheeks flushed, and his ears turned red—

And the scariest part was that these reactions were completely beyond his rational control.

All his defenses were dismantled. These overbearing pheromones cruelly and physically peeled him open, forcing him to reveal his most defenseless, least aggressive inner self.

Forget fighting; he probably didn’t even have the strength to resist.

It was… terrifying.

It wasn’t until the collar gave a soft beep and the needle-like pain at the back of his neck became sharp that Jiang Zhou felt his feverish brain start to cool. His shattered logic began to piece itself back together.

His spine was shivering as he pressed himself tightly against the door to keep from collapsing.

The room was incredibly dim. Jiang Zhou lifted his gaze and saw a tall, lean youth sitting quietly on the edge of the bed, shrouded in heavy shadows.

His skin was a cold white, his brows dark and thick, and the thin folds of his eyelids made his eyes look freezing cold.

Jiang Zhou could only see his eyes.

Because the youth was wearing a terrifying, black biting muzzle.

The contrast against his pale skin created a violent visual shock.

Those pitch-black eyes were both cold and scorching. His gaze was pinned on Jiang Zhou, giving him the terrifying sensation of being a hunted prey.

He shivered, his instinct telling him to run. His sweaty palm reached weakly for the doorknob.

But Cheng Bing didn’t give him the chance to flee.

The Alpha pheromones were aggressive and invasive, like a deep-sea cage, tightening around him bit by bit, stopping all his movements.

Cheng Bing just watched him quietly. Then, a cold, low, and raspy voice rang out from behind the muzzle, commanding him—

“Come here.”