One day, her husband suddenly brings home a man he calls "senior." This "senior" is outrageously bold, pressuring the husband to go play pachinko. The reason? An outrageous plan to repay money lost in mahjong by making the wife give blowjobs. Unaware of this scheme, Ryoko Sena is shocked and desperately resists, but eventually can no longer endure it orally. How will the "senior" handle this escalating situation?