Ямабукі Цубаса

He is a classmate of Shiratori who is always trying to charm high school girls and young women (but has no interest in Middle school or younger "flat" girls). He happened to meet Shiratori when he was dressed as a girl due to a prank and fell in love with "her". Without a name to call this newfound love, he nicknamed her "Reiko", not realizing that she was really Shiratori.