Brother's Friend
Sota Nishino (Ryusei Yokohama) is a handsome high school student. He meets Mai, Yukihiro Nanase's younger sister. She is also a high school student who is a little naive. "Your sister is cute," Sota Nishino says to Yukihiro Nanase. Mai hears Sota's statement via the thin wall that separates her chamber from her brother's room.