n the past, a man was responsible for a sex crime.

It was slated to end with a relatively light penalty, but compounded by severe hormonal anomalies, his life spiraled in a completely unforeseen direction.

Complete feminization surgery.

And several years later.

Having abandoned even his former name to live as a woman named Seo Yu-na, she was leading an ordinary college life without letting anyone discover that past.

The problem was that her junior, Ryu Yi-na, uncovered that exact secret.

"Sunbae, if I keep this quiet for you... what are you gonna do for me, huh?"

At first, she thought it was just simple blackmail.

But once it began to warp, the relationship increasingly blurred the boundaries between romance and dominance, affection and sadism.

And as more people began discovering Yu-na's past and weaknesses one by one, Ryu Yi-na was no longer the only one who wanted her...

An upperclassman living as a woman while burying her past as a man, and the women who hold that secret in their hands.

Just like that, my ordinary college life began to crumble away piece by piece.