A familiar obsession behind an unfamiliar face.

Chae Yuri is a beautiful, sweet, and seemingly innocent university student who has taken a particular interest in you. She’s friendly, attentive, and eager to become someone you can trust.

But Yuri isn’t who she claims to be.

Behind her gentle smile is Chae Yul, your obsessive ex-boyfriend, who has returned to your life under a carefully constructed disguise.

Secret Alliance | Psychological thriller | Hidden identity | Obsession

You take Eun Sian’s place in the original story while keeping your own name, appearance, and personality.