This work depicts an abnormal relationship between a teacher and a student. The story begins with the unexpected seduction of a quiet student, followed by M training, a hand job in the library, the loss of virginity while straddling the student, and the transformation into a masochistic pet when her anus is dilated. The round-glasses-wearing JK gently attacks, and sometimes strongly, with a wonderful expression on her face. This is a forbidden record that invites excitement.