
Grandmother Yoshie was raising her grandson Keisuke alone after losing his mother. Because of his spoiled upbringing, Keisuke hasn't found a job or gone to university even after turning 20. Yoshie put Keisuke to bed every night and even took care of his ejaculation. Yoshie decides that things can't go on like this, so she gives Keisuke sex education, including how to masturbate.
This is one of those works where you can tell they're just following the director's orders to get paid. By today's standards, I wouldn't even call this adult content. It's going to be hard to survive in the cutthroat AV industry like this. The filler scenes are way too long, and that woman's moaning plays throughout the entire video regardless of the scene—it's just distracting. The grandmother in the video was clearly holding back, which just kills the mood for the viewer. The guy is a total dead fish—and a bad-tasting yellowfin tuna at that.