Tsukasa, an overworked daycare teacher, comes home one night to find a total stranger passed out in his living room! Little does he know that this guy's no ordinary human... but an incubus who can change between man and woman at will! The stranger, Shin, says he has nowhere to go and begs Tsukasa to let him stay. But, Tsukasa can already sense this is going to be trouble... Is living with an incubus safe!? Pleasure comes at a price...