Nanka Kawatteshimatta Osananajimi - Ch. 119 - Sulking mother

[MangaDex]

 

[LemonLies]

In Japan, married couples are legally required to share a surname, and hyphenation isn't really done. Although as expected it's most common for the wife to take the husband's name, it's far from unheard of for the husband to take the wife's name instead.

 

[anuanuanu]

I thought the sister implies that bro could marry Misaki (Mikoto's mother) instead.