1kgpotatoes's manga / #Threesome(6)

Chika, Nao, and Ryo are all friends...with extra, extra benefits. During a threesome, Nao, a loving and mischevious boyfriend with plenty of affection to go around, proposes Chika try out being a bottom. At first, Chika refuses, but after some convincing from Nao, he eventually gives his ass up to Ryo. Once Chika and Ryo start doing it, a whole new door opens to their relationship.

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!?