Before she got married, she was a playgirl who made love with numerous men. But she thought such a life was meaningless, and married an honest man. While she is spending a peaceful life, she happens to meet an ex-lover.
Source: AnimeNfo

Based on the game by Cocktail Soft.
Collin, a relatively noble but ordinary man – finds himself lured to a cave by a dream in which a beautiful girl named Feelia appeared before him. Even as he was warned off by the elder of his village, he still feels drawn in… and with the arrival of a beautiful adventurer, and just a trace of seduction… in he shall go.
But what lies in wait? And what of the mysterious girl who appeared to Collin in his dream?

Based on a game by Atelier Kaguya.
Touya spends his summer vacation with 4 live-in home tutors. However, his lessons are not limited to book-learning…

In the near future, the world as we know it has been spoiled by our negligence. From the stratosphere come five beautiful nymphs in the shape of angels, bearing the fragrance of forbidden fruit. It appears their desire is to bring pleasure to the devastated human race. A young programmer working late spots one of the beautiful girls on his balcony, peeping on a couple across the way. Once she departs he is surprised to find the scent of fruit lingering in the air. He knows he must pursue her, what he is yet to discover is that she’s not of this Earth!

One day, my father suddenly says to me, “I think you’ll need your mother, Keita.” My mother passed away when I was a kid. I was sad at first, but I somehow managed to accept it. But why now…? Anyway, my father brings four ladies in front of me and says, “The girl who goes with you the best will become your mother. You live with them for a while and score them.” I don’t need my mother anymore, so I just give them low scores. Like this, I start living together with four ladies…

Based on the erotic game by Grand Cru Noir.
The seemingly strict and disciplined school-council president has a secret. She loves getting roughed up, humiliated and being fucked in the ass. Didn’t see that coming? Well, the new teacher that transferred here certainly did. But she isn’t gonna report her. She just wants something else in return…

Makino has taken it upon herself to turn her father back to normal, but her own desire starts to cloud her judgment. When he comes to her work for her to keep her promise, passion starts to spiral out of control as the other sisters become jealous of her. Does she really want him to return to normal? Or does she just want him for herself?

OVA produced by the manga publisher Toranoana.