The son of a liquor store, Mine, and the son of a flower shop, Chiaki. The two of them change from childhood friends to brothers-in-law due to their parents' remarriage. Chiaki, who is younger but cheeky, is a handsome guy who smiles in front of everyone. One day, Mine loses consciousness after drinking too much. The touch of someone's lips remains faintly in his hazy memory. While searching for the one he kissed, his relationship with Chiaki begins to change.