Takumi's neighbor and childhood friend, Mizuki is cheerful and active, she teaches swimming lessons at the local pool. She has a habit of waking up Takumi every day.
Kirishima Satsuki
霧島 皐月
♀ f
Mizuki's younger sister. She is also Takumi's classmate and has a close friend-like relationship with him, who can easily talk about anything.
Mitsuki's best friend, the daughter of the president of a major civil engineering company, Hirasawa Gumi.
Hirasawa Yuuki
平沢 優輝
♂ m
Takumi's best friend and Kazumi's younger brother.
Kasori Yuuko
賀曽利 優子
♀ f
Vice-President of the Student Council, who has an efficient and precise brain like a computer. She does most of the student council work alone and has a cool atmosphere. Yuuko is called "Razor Yuuko" because of her relentless and strict response and is feared by the other students.
Kirishima Hayato
霧島 隼人
♂ m
Mizuki's and Satsuki's father. He has always liked Takumi, he hopes that in the future he will marry one of his daughters
