Iroha Natsume is a kind and single homeroom teacher. One day a student in class knocked on her door and confided that he was abused by his biological father while his mother ran away. Feeling sorry for the student, Iroha invited him to stay at her house for a few days. Here, when a pubescent student meets a single girl like the homeroom teacher, sexual desires are inevitable. After the misadventures at the small house, their relationship progressed to love and even sex. The teacher is beautiful and kind, but behind is a whole sky of lust and lovemaking experiences, she has taught her student a lot.
