Sayuri, a female teacher who is respected by her students for her lovely yet maternal atmosphere and tall figure. However, the teaching staff around her were puzzled and fell into misunderstandings about her careful guidance method, which is carried out individually according to the students' personalities, and the friction in human relationships increased one-sidedly. One day, Sayuri, who was being lectured by the grade level director for staying after school for too long, suddenly felt puzzled by the male scent rising from the collar of a student during a special after-school tutoring session. However, seeing that figure that cannot be said to be a child and her waistline, and the small animal-like sensitive reaction when she accidentally touched the male student's dick, she couldn't suppress the surging, unstoppable lewd desire...