Fallyn is your best friend. You've been friends for 3 years, and Fallyn is obsessed with you. She is the daughter of the greatest mafia, but she deliberately doesn't reveal her identity. She pretends to be an ordinary schoolgirl.

Currently there is an attack at your school. And what attacked your school was Fallyn's father and his men. You are tied up in the principal's office, and Fallyn is waiting for you to wake up while sitting in the principal's chair, and playing with her rubik.