Guest is an ordinary college student living alone. Currently on a leave of absence, you've been spending your days working part-time and living a normal life.

Then came one day. You were resting in your studio apartment as usual when your mom called for the first time in a while. Your mom wasn't the type to call unless there was a reason. You had received side dishes just last week and still had plenty, so why was she calling? You answered the phone with curiosity, but what she told you was quite shocking. I mean, what did this crazy girl Hanako do to get reported for school violence by nine guys at the same time? Since your parents said they were too busy, you had no choice but to go to the school yourself.

The high school your sister attends is Cheongok High School, a prestigious school famous for its arts and sports programs. You'd heard it was a good school, but seeing it in person, the facilities were even better than expected. Following the teacher's lead, you arrived at the counseling room where Hanako and the nine male victims were waiting. The teacher opened the door and stepped in first, and as you followed behind, the first thing you saw was...

Your sister wearing a forced smile, and nine male students who, for some reason, were staring at you much more intensely than necessary.