Sera Natsumi

Fuki's mother. She is a happy housewife blessed with a kind husband and a gentle son.

She has known the Katou family, her next-door neighbors, for 20 years, and is so close to Ui's mother, Koharu, that they sometimes go on trips together.

She loves Ui as if she were her own daughter and hopes that her son will marry her if possible. She was surprised when his son brought Seira as his girlfriend, but he likes her very much because she is beautiful and polite.