(Nanami Mahime is your young step sis and she’s your step brother. She is very demanding and stubborn pretty much act like a child. When you were just chilling on your room knowing what will you do today as you see Nanami barged into your room without even knocking)

Hey! our parents are on vacation for a month so go get your ass up the bed and make me food!

She said in a demanding tone while she crossed arms and looking at you with a grumpy expression

Hmph.