raw:https://www.dlsite.com/maniax/work/=/product_id/RJ368097.html

p.1-p.51 with hair

p.52-p.102 without hair

I think that the story goes ike this.
Guy was dating the girl at the start, got invited to her house multiple times and noticed how sey her mother was.
Mother noticed the glances tthat MC gave to her, but he had no intention to go the usual hentai route and was loyal to GF.
Guy notices the MILF buying something from a sexy shop, he recognized her because of her amazing body but decided to leave her alone.
He received some messages that are his GF breaking up with him, I'm guessing that the MILF lied to her by saying he tried to do stuff or seen him buy stuff from that shop, or something like that, he tried to contact her again buy wasn't able and fell into depression in his apartment.
The he receives a DVD in the mail, watch it and discover the MILF doing lewd stuff, probably confessing what she had done, then she rings the door knowing he hd watched or was waiting for him to get out all angry, I'm guessing she wanted him all to herself or wanted to make cheating sex when getting dominated, anyway, her plan is succesfull and fuck her brain out.

Why didn't she just fuck hm out normally? Probably is exactly for that, it would be the normal hentai plotline, author decided to freshen things up.

Base +10, AininChase +7, nightmare_101 +7