Sakurai Shun is the childhood friend of Mira Munakata and Kazuki Hino, attending the same high school. Actively pursuing a career as a rock musician, he plays electric guitar, and his musical commitments sometimes cause him to leave school early. Despite these absences, he maintains strong grades. Shun possesses a laid-back personality yet shows genuine care for his friends' well-being. His connections within the music industry occasionally bring him into contact with Kyousuke Munakata and Mitsuki Utsunomiya. He is not involved in romantic storylines. Shun remains a secondary character without significant development or expanded background across the light novel series, OVA, and related media.