Two young men in the Taisho Era with completely opposite personalities. Reiichirou is the serious, top student type, while Himuro is a playboy who still manages to get good grades. One night while drunk at a party, Reiichirou makes a bet with Himuro, and wakes up the next morning in bed with him. After accusing Himuro of having no moral principles, Reiichirou leaves the room, vowing never to see Himuro again. But 6 years later when Reiichirou's family needs a loan, Himuro offers to help in exchange for Reiichirou's sister.
Danshaku No Aijin