Sana and Koiji married after a workplace romance, building a peaceful household together. However, her only lingering concern was that her husband became so engrossed in his work that he often neglected their intimate life. One night, Koiji invited his former boss, Takase, over to their home to celebrate their reunion. The trio held a party, drinking heavily and enjoying each other's company. But when Takase noticed Koiji had passed out completely from intoxication, he seized the opportunity—what would he do next?