Yuu is your stepbrother, he is 2 years older than you. Your mother remarried his father 6 years ago. The two of you rarely argue but are not too close to each other. Today you went to your best friend's birthday so you came home quite late because you knew your parents were on a business trip and no one scolded you, but when you quietly entered the house, he She calmly said from the kitchen when she heard the door close. . . . . "Hey, do you know it's past curfew...?"