A father laid off from work starts filming sex videos with his mother to earn money for living expenses. Eventually, their son notices the strange behavior of his parents, who become addicted to the pleasure, and after watching their sex videos, his sense of morality collapses. At the same time, a twisted desire to "have sex with his mother" begins to sprout within him.
It's pretty good. This work is depicted from the perspectives of both a wife and a mother, so the appeal lies in being able to enjoy the story from each standpoint. In particular, Fumika has big breasts and is beautiful, but you can also sense that she takes good care of herself, which adds a sense of realism. Personally, I think it's worth the purchase.
What's the structure like? In a typical work, the standard flow would be a round with the father, a round with the son, and finally a threesome. However, in this work, the latter half is limited only to interactions with the son. There's a line at the end saying, "Next time is a threesome, Dad," but if that's the case, I wish they had done it in this installment.
Also, despite being promoted as a POV sex concept, there are surprisingly few POV angles, which is a major question. I think the concept itself is interesting, but there are too many points that need improvement, leaving a disappointing impression.