>>280713230
That's her sister Haruna, not her mom dumbass.

>>280400802
I don't know, I'm getting kind of tired of the Haruna arc. It's gone on for 2 whole volumes now.

Are we getting the sister arc next season?

Watanare have large gaps between releases. After volume 4 the author didn't release a single volume for a year, and it's been since months since volume 7 was released.