When her mother passes away suddenly, Shinozaki Sumire finds herself alone and without a means to support herself. Out of desperation she turns to the message board Free Friends to earn some money. She develops a relationship with her first partner, Kaito, without realizing that they’re much more than strangers…

A young schoolgirl, Ruruna, finds herself in the wrong group of friends who only talk about their sexual escapades. Not having any experience, she feels left out. Her friend Ria says: “Hey, why don’t you try having sex with my little brother? I do it all the time!” They end up both having their way with the poor boy…

A young schoolgirl, Ruruna, finds herself in the wrong group of friends who only talk about their sexual escapades. Not having any experience, she feels left out. Her friend Ria says: “Hey, why don’t you try having sex with my little brother? I do it all the time!” They end up both having their way with the poor boy…

Our protagonist, Takesaka Munetaka, fails the first time he tries having sex with his lover due to trauma he experienced in the past. His sister Ritsuka and his cousin Momotani Mashiro literally put their bodies on the line to give him “sex lessons” and help him recover from his trauma. However, his other sister, Wakana, who gave him his trauma in the first place, joins the fray and the lessons become more than just lessons! Here begins the sisters’ war over their little brother!!

The story of two rich sisters, Tamaki and Leila, and their respective boys, Tatsuya and Yuusuke.

The story of two rich sisters, Tamaki and Leila, and their respective boys, Tatsuya and Yuusuke.

The story follows Mizuho, a healthy busty girl, and her perverted boyfriend. Mizuho lately put on some weight and now she wants to exercise to lose some of it, but her boyfriend only wants to have sex every time they’re alone…

The story follows Mizuho, a healthy busty girl, and her perverted boyfriend. Mizuho lately put on some weight and now she wants to exercise to lose some of it, but her boyfriend only wants to have sex every time they’re alone…

The story follows Mizuho, a healthy busty girl, and her perverted boyfriend. Mizuho lately put on some weight and now she wants to exercise to lose some of it, but her boyfriend only wants to have sex every time they’re alone…

The story follows Mizuho, a healthy busty girl, and her perverted boyfriend. Mizuho lately put on some weight and now she wants to exercise to lose some of it, but her boyfriend only wants to have sex every time they’re alone…

Inside a private hospital, a scientist is transforming females into sex slaves.

Inside a private hospital, a scientist is transforming females into sex slaves.

A female medical investigator is developing a drug that can allow the possibility of an impotent female or male to procreate. But the true reason is that she is an hermaphrodite (dual sex) but her both sexual organs are impotent an unable to procreate. So she develops that drug, making two version, the blue one for males and the red for females. But as any new medicine she must try it out first, there is when her nurse assistants became useful and then she must analyse each reaction in each subject, including herself, expecting some interesting outcomes.

A female medical investigator is developing a drug that can allow the possibility of an impotent female or male to procreate. But the true reason is that she is an hermaphrodite (dual sex) but her both sexual organs are impotent an unable to procreate. So she develops that drug, making two version, the blue one for males and the red for females. But as any new medicine she must try it out first, there is when her nurse assistants became useful and then she must analyse each reaction in each subject, including herself, expecting some interesting outcomes.

A long time ago, the Rindo Clan was cursed by a vengeful spirit so that no male children would ever be born. To counter the curse, every three generations, the Rindo must beget children with a family possessing strong spiritual energy. Ever since that day, the Higetsu family have been important and well-treated servants of the Rindo. It is their duty to mix their bloodlines every three generations with that of the Rindo heir.

A long time ago, the Rindo Clan was cursed by a vengeful spirit so that no male children would ever be born. To counter the curse, every three generations, the Rindo must beget children with a family possessing strong spiritual energy. Ever since that day, the Higetsu family have been important and well-treated servants of the Rindo. It is their duty to mix their bloodlines every three generations with that of the Rindo heir.

Haroumi Shiki, due to unforeseen events, is forced to stay at the home of three sisters with whom he used to play as a child. While there he grows closer to each of them in his own way.

Due to unavoidable circumstances, Haruomi is freeloading at his relatives’, the Orifushi sisters’, house. Since that day, his common everyday life has come to a screeching halt.

The eldest sister is the gentle and maternal Natsumi. The second is Akina, a bright and cheerful girl for whom a smile is well-suited. The youngest sister is the bratty Mafuyu.

Aya becomes depressed when she finds out that her other sisters have already made a move on her beloved elder-brother before she gets a chance to. Will she be able to win him over instead?

Keiichi is a young man that lives with his two younger sisters, Ririna and Momoka. While their parents are out of town for the entire summer vacation, Keiichi discovers Ririna’s vibrator in the bathroom. She agrees to do anything he wants in exchange for keeping quiet about it.