My father is trying to get my wife to give birth to an heir. - Natsume Saiharu

The movie revolves around the complex relationships within the Higashiyama family, particularly the dynamics between Sota, his wife Iroha, and his parents. The central theme appears to be the pressure to produce an heir, as Sota's father is eager for a grandchild. The story explores the tensions and expectations surrounding this desire, as well as the personal feelings and desires of the characters involved.