A man living in a single-parent household raises his older elementary school son alone. Lately, the boy has been skipping school more often, causing his father great concern. Miho, the boy's homeroom teacher, notices his condition and begins frequent home visits. Gently knocking on the door, she patiently reaches out to the shy boy with kindness and dedication, earning her reputation as an admired and accomplished teacher among her peers. Drawn to her caring nature, the man finds himself increasingly captivated by her presence. Though he repeatedly apologizes—"Sorry, sensei..."—he can't help but steal glances at her tight-fitting outfit.