To you I'll be staying at Yukiko's house tonight.

Nanako is a wife who lives an ordinary life with her husband. One day, the water supply broke and when he asked for repairs, the worker came to Kawase Mitsuru, a seemingly dull young man. Mitsuru apparently moved to Tokyo and trained to take over his family's construction company. I'll get it repaired right away, but water starts gushing out of the water. He's a hard worker, but Mitsuru seems clumsy. A few days later, Nanako meets Mitsuru, who has been fired from work and has changed, and she wants to stay by his side for just one night, so she takes a pen and writes a false letter to her husband.