Shin Iryuu

Itsuomi's best friend in Japan. Shin went to the same high school as Itsuomi Nagi and Emma. After high school, he became a hairdresser and experiments with Itsuomi's hair.

Although Shin usually gives the impression of being unapproachable due to his frail demeanor, he becomes cheerful and friendly whenever he gets drunk. He is caring and warm towards people he is close to.