A heartwarming comedy about families living in the same apartment building.

The neighbors had rarely exchanged more than simple greetings. But one stormy night, when a nearby river threatened to flood, they are forced to spend the night together. Through their late-night conversations, they get to know each other. Then, Wataru suddenly remembers a long-forgotten promise he once made to his wife: that they would divorce once their child turned twenty. Now, he has only two months left until his daughter’s twentieth birthday!