Mutsuki Ichimonji

Оригінальне ім’я: 一文字むつき

Chitose's homeroom teacher and a teacher of Japanese Classics, she is the first to move in with him. She is gentle until Chitose slacks off on studying. She is seen cooking or cleaning the house, if she is not trying to lecture Chitose. In the Final OVA it is revealed that she also has feelings for Chitose.