"We kissed, you invited me, and we had sex. ...That means we're lovers, right?”

Miyara Hitoshi, a company-employed lehman who is always busy with his work, witnesses what appears to be a mass lynching in a back alley on his way home from working late one day.

The leader of the group, Haruhara Rui, was there and threatened to give him a ride home, Miyara, sensing his own safety, invites Haruhara into his home. Miyara unwillingly shares a heated one-night stand with Haruhara.

The next day, for some reason, Haruhara declares Miyara his boyfriend, and Haruhara, who does not know how to fall in love, begins to approach Miyara in a criminal-like manner,

Miyara gradually falls for him...?