On the internet, Katsuragi Keima is renowned for his ability to win over the hearts of essentially all females. This only holds true in dating sims, as in real life, he goes by the name Otamegane and has no interest in female sex, which is predicated on reciprocity. Elsee, a female devil from hell, comes up to him one day and requests his assistance in capturing demons that have escaped from hell. Keima will go insane if he is unable to collect every ghost. Apparently, girls' hearts are where the ghosts lurk, emerging only when they fall in love.
