OKSN-232 "Sex isn't just intense," Yumi Kazama, a mother gently teaching her son who keeps pistoning

Yumi, who lost her husband, has raised her son Nobuyuki by herself. - It seems that her son recently got a girlfriend, and she secretly watches over him while having complicated feelings for him, but one day he confides in her about his worries that he can't satisfy his girlfriend because of his premature ejaculation. - Yumi was worried and decided to give her son sexual training. - She tries to stimulate him with handjobs and blowjobs, but Nobuyuki's premature ejaculation doesn't go away, and eventually Yumi decides to use her own body to teach her son about sex...