After spending their school years fighting and "making up," Yoshio has become a bar owner and Tenma the young leader of the Shisui group, a yakuza organization. Stuck with each other whether they like it or not, they've become something akin to lovers.
After not seeing Tenma for a while, Yoshio grows worried and drops by the yakuza residence to ask about him. Upon Tenma's return, Yoshio jokingly comes on to him, and Tenma gives him free rein to do whatever he wants. As Tenma rides him with merciless fervor, Yoshio notices that something's amiss about him.
The way Tenma's acting tells Yoshio that he's hiding something from him, and the fact that he won't open up to him makes Yoshio sad.

A love story between a caring bar owner and a tough, cool young yakuza boss: two men living lives full of bitterness, locked in a bittersweet lifelong love.