"Sleep tight if you don't want to die, Detective-chan." After having to stop at a gay bar to investigate an affair, Kaga, a young man who is trying to make himself a name as a detective, is approached by a long-haired man who starts to converse with him. But when his subjects head out of the bar and he is about to follow them, he is stopped by the black-haired beauty, who begs him to ‘don’t go’, ‘to stay with him’, and Kaga couldn't help but feel nervous; but he can't take his eyes off the subjects, so he leaves… only to be beaten in a dark alley?! A buddy suspense love story between a good-natured Detective and a careless Shinigami!