OVA based on the erotic visual novel Tenioha! 2 ~Nee, Motto Ecchi na Koto Ippai Shiyo?

Based on the game by Frill.

Hyde is a traveling treasure hunter who arrived in Arville with his childhood friend Sakura. Near Arville is a cave, its the largest ruin of the world. Hyde came across a dying man, whom placed a mysterious amulet within Hyde’s hands. A week later, the amulet started to glow. (Source: ANN)

Yuji went to a fireworks festival with his stepmother. The crowded festive atmosphere captured both of them. However, it seems that Mira has a little more “grand” plans for her stepson than just eating well and having fun. Not a single living soul can prevent a woman’s desires.

After his parents passed away many years ago, Yuuji Enomoto was adopted into the family of his childhood friends Yuna and Nina Tsubakihara and their mother Mira. Now in high school and known as Yuuji Tsubakihara, he lives under the same roof as a pair of cute twins and a beautiful older woman. Although the shy, reserved Yuna and the outgoing, talented Nina are his family, Yuuji submits to his desires after witnessing Yuna turn down a confession. But as Yuuji and Yuna finally consummate their lifelong love, can Nina and Mira stand idly by? [Written by MAL Rewrite]

Minato’s last blood-relative, his grandmother, passed away and now he is all alone in this world. He thinks about how he was blessed to have family, but dryly laughs about how he’ll need to take care of himself now. However, during the funeral of his grandmother, someone named Kazari approaches him and offers to admit him into a prestigious school, in addition to providing him a place to reside. Minato immediately and thankfully takes up on this offer, but soon realizes that the Suzu Academy is an all-girl’s school, and the “ojou-sama” that he’ll be residing with has flaws of their own which really shattered his expectation for a high-class lady. (Source: VNDB)

Takumi Musashino was once an ordinary high school boy, but that changed when his body transformed into that of an alluring high school girl thanks to an experimental gene therapy treatment he received after being diagnosed with a terminal illness. She astonishes her classmates with her new body, receiving mixed reactions from them. While girls like Anri Sogahara offer her important adjustment advice, her male peers begin to see her as an object of their desires… Although Takumi is both confused and nervous about her new being and appearance, she will soon discover the wonderful pleasures of being a young, adolescent woman. [Written by MAL Rewrite]

A young man discovers the true erotic touch with it he can tease almost reaching orgasm on any woman, so he decides to use it on his chosen target with some interesting results. (Source: ANN)

Based on the adult PC game by Orc Soft. After five years Kenta returns his former house. Now his uncle’s family lives there and he is supposed to stay there again because he plans to attend the nearby school. That means he’ll meet his older cousins, twins Saki and Maki , again who used to take care of him when he was younger. But to his surprise Saki and Maki have grown into very outgoing girls. Kenta quickly learns that his uncle got transferred to another city so it’s only the three of them in the house. Saki and Maki waste no time to approach him very aggressivly. (Source: VNDB)