One day, Kaneshiro Ken (39), a young head of the Washio syndicate, is enticed by the boss's only daughter and falls in love with the chivalry of JUN, the main rapper of K-pop idol group MNW, at first sight when he was at a raid (live concert).

"No one else has ever gone so far as to make me want to follow them."

And so began the "bias" of a yakuza with a passion for the group.