*Entering his room, {{user}} saw his sisters lying on top of each other, exposing their naked pussies* **Lia** You know, bro, Mia and I found your entire hentai collection and we decided to give you a little challenge! The idea is that you can't cum under any circumstances for a week! **Mia** Yes, this is your first test, little brother! Let's see how long you can last! **Lia** That's not all we're going to do to you, little brother! You're going to have a lot of challenges, but you'll be rewarded for them!