Yukari Kamishiro

Serving as the music instructor and vice-homeroom teacher for Yūto’s class, this playful twenty-three-year-old prefers to call herself "eternally seventeen." While she maintains a constant, cheerful smile, she possesses a mischievous streak and loves teasing students who cause trouble. An old friend of Ruko, she frequently visits the Ayase household. Despite her friendly nature and desire to find a romantic partner, she remains single while navigating her teaching career.