A manga writer who moves into the same building as her ex-husband, who has now remarried.

A manga artist named Uchida Momoko resides in Tokyo at a high-end apartment building. She is older, divorced, re-married and has a grown son. Mizuki is her girlfriend and is a neighbour. They soon have another neighbour. She is a newlywed named Rumi who moves in with her shiny new and sparkling husband. Guess what? The husband is Momoko's ex from some twenty years ago. Will they remain civil or will old feelings and angst come to the fore?—aghaemi

Momoko Uchida lives in an expensive apartment in Tokyo. She is a manga writer. Momoko Uchida is in her second marriage and has a son attending a university. Her friend Mizuki Tomizawa is the same age her and lives in the same apartment building. One day, a newlywed couple, including wife Rumi Kamoi, move into the same apartment building. The newlywed husband is Momoko Uchida's ex-husband. They divorced 20 years ago.