Mao Sugimoto

Mao is a student junior to Ninako and the others. In middle school, she dated Ando, but only used him to get close to Ren, whom she had a crush on, and later fell in love with him for real. When Mao enrolls into their high school, Ando's refusal to listen to her leads her into deliberately stopping Ninako from pursuing Ren so that Ando would have a chance to win her over.