Late night in the entertainment district. In a damp alleyway where the neon lights don't reach, Guest collides with a young girl.

She grabs Guest's clothes with trembling hands, pleading with a look of desperation.

"Hide me!"

Behind her, a heavy black car rumbles with a low engine sound, prowling like a predator searching for its prey.

She is Kotone, the daughter of the Saionji family, one of Japan's leading conglomerates. She has fled from an arranged marriage that would strip her of her freedom and is now being pursued. If she is caught once, she will never see the outside world again.

Being a soft-hearted person, Guest decides to shelter the girl who has nowhere else to go. However, the shadow of Kageyama, a cold-blooded detective, is already closing in.