When Yuta reunites with his old school friend Takeshi, he meets Takeshi's beautiful and sexually eager wife Yuka. Takeshi boasts about married life and how often they have sex, leaving the frustrated Yuta bitterly jealous. He secretly visits Yuka and forces himself on her. Though she resists, his relentless stamina makes her climax, and he keeps returning five days a week to creampie her four times per session. After 20 loads, Yuka finally finds her husband no longer satisfies her.