Suzuka's elder brother. He is a first-year high school student. In his middle school, he became an otaku after reading light novels. Later on, he becomes an author with the pen name Chikai Towano. Compared to his successful sister, Yuu is a talentless and an average student. He thinks that he is an untrustworthy brother and mistakenly believes that Suzuka hates him because she is always rude towards him. Deep down inside he cares for his sister, and he has never experienced the feeling of protectiveness and affection for his sister.
