[ENGLISH-SUBTITLE] OKSN-229 ``It's not enough to just have intense sex.'' Miwako Yamamoto, a mother who gently teaches her son who makes pistons.

Miwako, who has raised her son on her own, can one day confess her troubles to her son. It means that I can't have sex well with my new girlfriend because of premature ejaculation. How did you tell her husband if she had a husband? The training that started with masturbation assistance eventually changes to forbidden sex.