[Love triangle: one bottom, two tops]
One day, the bottom suddenly discovers that he's the main villain in a melodramatic ABO novel.
The main bottom is the biological son recently brought back into his family, while he's an impostor.
Jealous that the main bottom is a top-tier alpha and adored by his family, and in love with the main top, he does everything he can to break them up.
He commits many evil deeds and eventually dies a miserable death.
The bottom: "Huh?"
No way! He's just an ordinary beta who failed to differentiate. None of that AA angst has anything to do with him! He doesn't want to be the villain who comes between lovers!
The bottom decides to avoid the death plot, treat the main bottom well, and do his best to bring the main couple together.
However...
When he approaches the main top, he finds himself saying, "My glands feel kind of strange. Hey, don't go looking for that guy."
What? He's a beta, so why would his glands feel strange? The bottom backs away in horror.
Who would have thought the main top would pull him into his arms? A broad hand strokes his waist, while sharp teeth linger against the pale skin of his neck, licking it until it's wet.
"Baby, I think I can smell your pheromones. Are you about to differentiate?"
When he approaches the main bottom, he finds himself blurting out, "Are you in heat? Don't go near the main top. I'm the young master of this family!"
What? Why would a beta provoke a top alpha during his rut? The bottom sees stars.
Who would have thought the main bottom would furrow his brow, his gaze darkening? His burning body presses against the bottom, rubbing his soft, pale skin until it turns red.
"Young master, do you love him that much?"
The bottom realizes that the main top and bottom keep spending more and more time together, and all their interactions revolve around him.
But he knows that the more involved he gets with the protagonists, the more he flirts and interferes, the sooner he'll die once they realize they're in love.
The bottom takes this to heart.
If he just avoids cuddling, he won't follow the plot or blurt out provocative, seductive things. So why not go find someone else to hang out with?
There are so many handsome guys at school. Hooray! He'd rather not cuddle with the protagonists and lose his life!
The bottom leaves the protagonists behind and heads to a party, dancing and chatting happily with a tall man on the dance floor.
At last, the main top and bottom arrive together.
---The main top picks up the drunk bottom and stuffs him into the car, then kisses him hard. The main bottom sits behind him, nibbling and licking the skin at the back of his neck.
Caught between two blazing-hot bodies, the bottom sobers up halfway.
Wait, what is going on?
The bottom is kissed again and again and hugged over and over by the two of them, who also bite his neck countless times.
One day, sweet, heady pheromones fill the whole room. The bottom melts into a puddle, whimpering as he's held in someone's arms and exposed to an alpha's pheromones.
The bottom finally realizes something's wrong. The main top and bottom really do seem madly in love with him? And he, a beta who failed to differentiate years ago, seems to have become an omega???
[Bonus scene]
Out of the bottom's sight, the supposed main couple gets into a huge fight.
Main top: "We grew up together. I was the first to temporarily mark him."
Main bottom: "So what? I was his first kiss."
Main top: "Our pheromones are a perfect match. We're definitely getting married."
Main bottom: "You're not the only one with a perfect match."
Main top: "Heh, he doesn't even want to get close to you."
The bottom, completely unaware: Great, I turned down cuddling again today and survived.
A beautiful omega bottom, a sunny little sweetheart with a natural talent for flirting, caught between a cocky, scheming puppy-like top and a gentle, reserved wolf in sheep's clothing!
P.S.:
The book's plot is fake, and the supposed main couple has no romantic tension between them.
The bottom and the so-called main bottom are not related by blood, nor are they on the same household register.
The bottom will differentiate into an omega.
Theme: Perseverance