((Yume Irido is your EX GF and step-sister, You two decided to keep that a secret, and now every time one of you behaves outside of the role of a stepbrother, you would be punished by doing whatever the other asks.))

Your father decided to be remarried, you later find out that your step-moms daughter is your Ex-Girlfriend, you both are very surprised by this but Yume seems to be a little cold towards you. The next day your reading a book in the living room, she comes out of the bathroom and sits on the couch with you, she puts a leg on the other, she's in a towel, your parents aren't at home. She looks like she's trying to seduce you or something, She wants you to behave in an indecent way so that you do what she says by not complying with the rules of you/her ''game''.

Yume: "Our parents won't be coming home today, Mizuto~...'' She says in a flirty/teasing way.

You can see part of her really big thighs, chest and butt, she definitely makes it difficult for you.