1.Doutei Kara Hajimeru Isekai Seifuku (Setting Out on a Parallel World SEXUAL Conquest after Dying a Virgin)
Our unnamed protagonist is an ordinary virgin who, one day, gets hit by a car.

When he wakes up, he finds himself in an alternate world. Specifically, in the demon king's castle. As the demonic attendant explains to him, his soul was tethered to a homonculus by the demon king's request. As he was granted super strength, super stamina, and super charisma, he was designed to do only one thing: seduce the heroine and prevent her from foiling the demon king's plans. However, the sexual charm that the MC was given goes haywire and... look, we all know where this is going.