A chaste mother (Chisato), who lost her husband and raised her son on her own, loves and supports her son. Her son (Minoru) was a serious young man who wanted to pursue research and do a job that would please her mother. Chisato, who offered to not let her son go on to a doctoral course because her tuition did not last, was aroused by her lustful professor, and eventually raised and dominated her mother and child at home... . The professor was a leading figure in Japanese literature research, but he was the owner of a twisted libido and propensity.
