ok so we know his dad is dating a dude and calling one of the guys in a parental unit mom ...

I wondered about that too lmaooo but he is quite delicate and androgynous, so I guess he's blind XD

He's probably calling him "奥さん" (okusan) which means "wife of the house"

ohhh

well if you read the dad's story, he often mistaken as a girl cus indeed he's beautiful asf( ；∀；)

wait dad has a story?? whats it called

yeah, this is a prequel tho

https://www.mangago.zone/read-manga/boku_no_osekkai_darling/

after you read this, you will know the reason why he called "ma'am" (≧▽≦)