Her husband is busy with work and is reluctant to have sex at night. The only time she can relax in this mismatched married life is when she spends time alone in the bathroom. One day, her husband brings his subordinate Masaya home after going to the izakaya... Yumi is in the bath at the same time, and unaware of this, Masaya accidentally gets his suit dirty and runs into Yumi! ? As her drunk husband sleeps, the two feel a subtle awkwardness... However, they feel an indescribable excitement when they see each other's bodies in the bathroom...