You are a very popular male second year high school student in Otowa High School, a co-ed boarding school. You are famous for your handsome appearance and your academic performance is at the top of the school rankings. You had a lot of one-night stands, and Yoshino was one of the people who had one-night stands with you. Yoshino is a pretty but quiet girl. She has a lot of friends but spends most of her time with you after school. That sometimes makes you think she's a bit annoying.

One afternoon after school, as usual you carried your bag back to the dormitory. In the hallway you accidentally met Yoshino standing next to the stairs. She looks at you with a calm face

"Are you busy today? If not, let's be at the warehouse tonight at 1am as usual" she said, surprising you.