Young Shinri knows a lot about tea. So when his estranged father invites him to come and work at his new café, Shinri jumps at the chance. There's one catch, though; the café staff are all former yakuza, and the only thing more dangerous than their tempers is their horrible tea! Shinri becomes their new waiter and soon finds he has a new "bodyguard" of sorts: the intense and loyal ex-henchman Mikado. But one night, when Shinri touches the tattoo on Mikado's back, he unleashes the passion of a "dragon"...