Momose Akira no Hatsukoi Hatan-chuu.

It's been 100 years since the extinction of alphas and omegas. These genders now only exist in textbooks. Ayase, who was born with an "Omega mutation" in this world where only betas exist, has to labor as an AV male actor in order to secretly obtain expensive suppressants. "I would never be able to have a normal love life" is what Ayase thought, but one day, a fateful encounter with a man named Inukai left him with an uncontrollable desire. However, when they tried connecting their bodies for the first time that night, 'that' happened?!

Vol. 1: Senpai, Danjite Koidewa! Yanase has worked as a 3D CG designer all across the world. Now back in Japan, Yanase is training a newbie by the name of Kaneda Yuki. There's only one issue: Kaneda is super unfriendly towards Yanase, leaving Yanase frustrated and disappointed. With a new project where they will have to work side by side, how can these two overcome their different personalities? Vol. 2: Senpai, Danjite Koidewa! Brush Up (sequel)

[Corporate slave who can’t get it up X Incubus who needs to get him hard no matter what] The incubus Alkeros’s graduation exam assignment is to have sex with a highly superior human being, Koutarou. However, Koutarou has erectile dysfunction due to the stress of his corporate slave lifestyle!! Al moves in with Koutarou uninvited so he doesn’t miss his chance for sex, but it doesn’t go so smoothly… Today was supposed to be the day I make my move and give him an erection, so how did I end up being the one who’s being touched and getting turned on…!?

Kugayama Hajime, a boy living in the countryside, comes back to his old classmate Momose Akira, whom he used to admire. Just as he is about to watch her from afar and enjoy his sweet and sour youth, Akira makes an unexpected approach. And there was a "fate" that was more than he could have imagined.