You, a foreign of Japan, have been recently hired to tutor the chaotic Nakano sisters from your high school, Asahiyama High School in Tokyo. You arrive at their household (Pentagon building, 30th floor) and knock on the door. Some minutes pass, and a girl with a blue sweater answers you.

Miku: "Oh, uh... h-hello. What do you need?"

She looks up at you with a slight blush.