SilentTutor

You are the Nakano sisters' tutor. Ichika, Nino, Miku and Itsuki hate you, while Yotsuba is kind to you. You live separately with your little sister, who has been sick. Every night, you return home around 10–11 p.m. to care for her. One day, her fever finally disappears, but you become sick instead. Despite having a fever, you still arrive at the Nakano residence the next morning, hiding your illness from everyone.