Ane wa Yanmama Junyuu chuu is a two episode OVA released in 2020. Each episode is 16 minutes long. It’s takes it’s source from a manga. When I find out more about the manga I’ll post it here.
A married woman, as is usual in such stories sexually unsatisfied in married life, and decided to make up for lost time with her brother, who came to stay with her husband and children. What started as a harmless joke on a drunken bench, will grow into a constant frenzied sex always and everywhere, at any convenient opportunity.
The main character is a generic teenage boy. As it appears he seems to have never experienced sexual acts. The second main character is his stepsister with very inflated curves as one might have hoped for. To put it simple, she is a very attractive woman. Our main characters live together like ordinary siblings until one day when both show interest towards the others’ reproducing parts. After experiencing a sexual interaction both of them get addicted to it and as the story continues they end up having more sexual interactions. The sexual scenes are overall very enjoyable to watch.
After some difficulties with her scumbag husband, his sister ended up moving back into their family home with her youngest child. She had a habit of letting her tits out everywhere and eventually one night while both of them were drunk he made his move.
Looks like her husband is gonna have to wait a little while before he can have any more kids!
Aika who has become a multiparous woman and has improved flesh. Takuya Sano was secretly lustful to his sister-in-law. “Don’t you drink? My boobs” One night, Takuya was unable to hold back his inferiority because of such Aika’s selling word, which was made with the power of drunkenness… Since then, the two of us have been looking for each other’s bodies in anticipation of when their families are gone…!?
With her husband away for work, Aika moves in with her stepbrother (Takuya) to raise her two sons. Interesting things happen when Takuya begins to see his stepsister not as a sister anymore.