With his attractive body and alluring beauty, arch-incubus Akira has no trouble overcoming his prey with intense bouts of pleasure. He's one of the many demons who live peacefully disguised amongst humans, and he harbors a grudge against the demon-slayer clan who, in addition to being his natural enemies, murdered his best friend. This leads him to target the murderer's son Kurogane, hoping to gain a servant who'll double as his own dedicated source of sustenance! However, Kurogane believes intimacy should be reserved for couples, and he firmly rejects Akira's advances. When Akira tries to get Kurogane in the mood with some special hypnosis that can only be used by arch-incubi, it doesn't work on him at all for some reason...! Sparks fly when a gullible but straight-laced young man meets an arch-incubus who's had plenty of experience!
Akira is eager to get laid, but he doesn't want a boyfriend nor does he want to do it with a complete stranger. One day, when he tries to break things off with his no-strings-attached partner who developed romantic feelings for him, the guy desperately clings onto him in public, begging him not to leave. Coincidentally, Akira's former student from back when he was a student teacher sees him in trouble and saves the day! Akira is thrilled to be reunited with Tadayasu, who's as good-looking as Akira remembers him in high school, and convinces him, rather forcibly, to stay the night at his house... The more Akira gets to know Tadayasu, the more he becomes infatuated with the charming younger straight guy! However, Akira is reluctant to make a move on Tadayasu, who's technically still in his teens... So, can he hurry up and grow up already!?
His personality aside, Kiki, a medical student, is the perfect, most desirable bachelor. None of his relationships ever seem to last long, as he goes from one boyfriend to the next, but he's growing tired of this kind of life. Hikage, the waiter at Kiki's favorite cafe, openly shows disdain for him, unlike everyone else. But, one night, when Kiki returns to the cafe after closing to get his backpack, he catches Hikage pleasuring himself to Kiki at his usual table! Hikage has always wanted to be with a man, and since Kiki's the only other gay man that he knows, he's been fantasizing about him. This unexpected naughty side of Hikage gets Kiki's engine going, so he gives Hikage one heck of a first-time experience, making him climax over and over again. To top it all off, he promises to meet Hikage there every Thursday and sleep with him...
A good-looking scumbag overtaken by his desires and an awkward beautiful man with a feisty personality. Are they both only into each other for their bodies!? This is a bittersweet love story that starts from being friends with benefits!