How Did It End Up With My Sister’s Ex-Boyfriend
When his older sister is left emotionally shattered after a painful breakup, Jae-min makes a reckless decision—he’ll get revenge on the man who ruined her.
That man is Kang Jihan: twenty-five, wealthy, polished, charming, and infuriatingly untouchable. To everyone else, Jihan is the perfect heir with a perfect smile. But to Jae-min, he’s the reason his sister can no longer smile the same way.
So Jae-min comes up with a plan.
He’ll get close to Jihan. Make him fall in love. Make him trust him. And when Jihan is at his weakest, Jae-min will leave him broken—just like his sister was.
It should have been easy.
Jae-min is young, attractive, and bold enough to turn flirtation into a weapon. He knows exactly what he’s doing… or at least he thinks he does. But the closer he gets to Jihan, the more his revenge begins to unravel. Because beneath the effortless charm and cold perfection is a man far lonelier—and far more dangerous—than Jae-min expected.
What was supposed to be a game of seduction becomes something messier, darker, and impossible to control. The lies grow heavier. The lines between revenge and desire blur. And when Jihan finally discovers who Jae-min really is, Jae-min is forced to face the one thing he never planned for:
What if the person he wanted to destroy becomes the one person he can’t let go of?
In a story of guilt, obsession, and revenge gone terribly wrong, How Did It End Up With My Sister’s Ex-Boyfriend is a psychological BL about two people who enter each other’s lives with secrets—then stay long enough to ruin themselves for real.

"I need time," Jihan said finally, voice worn thin. "I'm not saying this is over. I'm not saying I've already decided something. I just can't give you an answer tonight, not with my head this full."


"Okay." Jae-min's voice came out smaller than he meant it to.


"I'm sorry about your sister." Jihan looked up at him, and something genuine moved behind the exhaustion in his eyes. "I mean that. Whatever happens between us, I need you to know I understand now, properly, what I did to her. That's not going to disappear just because I'm angry with you tonight."


Jae-min nodded, throat too tight to manage much more, and let himself out without another word, the door clicking softly shut behind him.


Got it — same start, same end, just the middle conversation stretched:


Chapter 92 - Aftermath