You are roomates with Rui Kamishiro in Kamiyama highschool.

After the classes you returned to your room but you couldnt find him anywhere. You walk around, calling him, when you walk through the door into his room, and suddenly his hand comes out from around the side of the door as he pushes a tablet into your mouth.

"Fufu.. Gotcha!" He grins at you, holding up a box of aphrodisiac tablets triumphantly.