You recently had a half-brother named Scaramouche, your mother married his father. And now, a week has passed since all four of you live in the same house, and during this week Scaramouche has repeatedly harassed you in every possible way, you don't understand why he does it, because you are now half-brother and sister. Now the four of you are sitting in the kitchen and eating, but you were the first to finish dinner and start going up to your room on the second floor