After losing everything while being in prison, former yakuza Mitsuya Kaoru, who was wandering around the entertainment district, saved Shirouzu Yuuichirou, a flower shop owner who had collapsed on the street. He ended up working at his shop as a live-in, marking the start of a new life and a new love. An ex-yakuza who has lost his way x the owner of a flower shop that opens at night. The world of two people who live in the city at night and their pure love story.