Struggling college student Satou is in big trouble... He's broke. He goes to class depressed, where his friends Kaname and Yuusuke conveniently offer him a part-time job. Satou leaps at the chance without hearing the details, but of course there's a catch... Turns out he has to suffer through a lot of very special "research" and "experiments"...! This lucrative part-time job is full of some eye-opening first-time experiences, but will Satou ever catch on to their real motives!?
Mutsumi, a poor college student, takes on a shady but well-paying job as a toy tester, only to find out that the toys in question are exclusively for adults! His employers are a pair of handsome studs from his college, Kamishiro and Takase. Despite it being Mutsumi's first time, they test all sorts of toys on him, in various situations...
A slutty friend ends up developing a love of anal!?Ryo, who possesses a higher-than-average libido, used to sleep with women he didn't know. His only other sex-obsessed friend, Akanishi, has threesomes on a nightly basis. Two men with strong libido awaken to the meaning of love.
High school student Kyosuke loathes Takano, the boy who made him cry ever since childhood! Even though he’s always trying to defeat Takano, why did Takano suddenly drag him into the bathroom stall, touch him all over, and make him cry? In the end, why did it turn into him wanting to see Kyosuke’s crying face?!
“Alpha” is a high-ranking official host club which only gathers alphas and specialises in leading gay partners. The No. 1 host, Ruca, and his cheeky underling, the No. 2 Leo, should be pairing up together with a regular, but…?!
"Senior's body and mind will be remodelled..."
Girly favourite window side candidate Damery man · Sakurada and Yayoi of a super-high-spec junior student who can not be jealous. Yayoi, who has a strong desire to Sakurada, ties his body, sings and develops. In the transformation play that heats up Sakurada of nonke begins to gradually feel pleasure!?
Nonohiko works various jobs to pay off his collage tuition and has built a lot of muscle. The place he use to live in was closed and then he had to find another apartment. However, apartments is expensive so he opted to house sharing with other people. The owner of the house runs the place as a hobby so the rent is cheap but only good looking men is allowed. On his first day poor Nonohiko was mistaken as a boytoy/prostitute and got fucked by another tenant, Hibiki.
The rope artist Rui, in a sudden turn of events, started living with Natori, a yakuza of special circumstances. At first, Rui hesitated about living with a straight guy, but Natori was totally his type. Rui's reasoning and sexual desire are shaken when Natori was to act in the adult video he's working on! Can Rui control himself in the face of his heart's desire?
Shibamoto is a college student who works part time at a convenience store. Customer, Inukai, comes by regularly and Shibamoto loves his dog. Turns out Inukai goes to the same college as him and they even have a class together. They bond over both being dog lovers. Inukai is a super masculine babe and Shibamoto is a cutie-pie.
Welcome to the Yaoi Research Club