Role-Playing a Dual Personality as a Background Character in a Manga

Synopsis

Original jjwxc synopsis:
Ji Qing, an S-class freshman at a superpower academy, binds himself to a comic forum system on his way to school. Comparing the comic with the school brochure, he discovers the comic’s protagonist is a classmate from his year.
Ji Qing: Interesting.
At this time, the protagonist is still an F-class rookie, while he is already at the pinnacle of freshmen.
While his S-class classmates provoke the protagonist, he’s daydreaming in the library; while his S-class classmates duel with the protagonist, he’s feeding fish in the pond; while his S-class classmates are utterly defeated by the protagonist, he’s eating in the cafeteria… Looking at the clichéd and stiff plot of the comic, Ji Qing feels utterly bored.
At the same time, the system, which disappears upon binding, suddenly returns. Looking at the comic before him, Ji Qing has a flash of inspiration—
Ji Qing (excitedly): Let’s make the current plot more interesting!
System (confused): …What do you want to do?
*
“Superpower Hunting Academy” is a mediocre superpower academy shonen comic.
Its early story revolves around the academy, where readers follow the protagonist through the clichéd and rigid plot. Just as readers were getting tired of it, the appearance of a new character instantly ignited the forums—
he was arrogant and acted erratically.
His origins were mysterious, yet he possessed the same face as the top freshman.
He walked the line between the underworld and legitimate society, repeatedly helping the protagonist while simultaneously placing him in danger. The comic became incredibly popular, with various pairings and plot discussions everywhere. Just as readers had built hundreds of threads discussing his relationship with the top freshman and the protagonist, the plot finally revealed his identity and past.
Comic Forum:
【Waaaaah, what? After you left, I became you.】
【Revenge, but it’s just me seeking revenge】
【Who died? I want revenge on whoever died!】
【Protagonist, don’t be an idiot! Quickly persuade him to return to Class S!】
Ji Qing: How about it? The plot is much more interesting now, isn’t it?
System (coldly): …What? How about it? You’ve turned a perfectly good shonen manga into a revenge manga!!!