One day, Hiroshi's son, Hiroshi, comes home with his homeroom teacher, Sato. Hiroshi was caught shoplifting at a convenience store and taken into custody. Seeing his mother apologizing on Hiroshi's behalf, Sato, the homeroom teacher, comes up with a bad idea to not suspend Hiroshi, but to toy with his mother, Ren's body instead. Ren, shocked by her son's shoplifting and filled with desire due to a lack of sex with her husband, is easily seduced by Sato...