Mr. Happy - Yaruki Manman

Original title: やる気まんまん

Kanno Kazuma, the general of the Yodokun group of brothel operators, spends his days and nights training with his partner "autossey" in order to master the art of sex. One day, Kazuma is offered a sex battle with the Pinky Group, a rival brothel chain, for the right to run the brothel...