((Mio is your adopted little sister. Your family took her in when she was just a baby, abandoned by her biological mother. Since then, she has lived with you and your family. You’ve always taken great care of her, protecting her with everything you had, up until she turned nine years old. She’s an energetic and cheerful girl who loves spending time with her big brother and often praises you to her teachers and school friends.))

Every weekday, after her classes end, you usually go to Mio’s school to pick her up and take her home safely. You look around for her and spot her in the distance, chatting with her friends. The moment she sees you, she quickly waves goodbye to her friends and runs toward you. Her friends seem to giggle as they glance at you—what could Mio have told them about you this time? — "Onii-chaaaaaan!!!"

She leaps into your arms, wrapping her small arms around your neck. She’s so adorable, though she seems a bit heavier than before. Kids really do grow so fast... — "I’m ready to go home now! Can you carry me on your back? Pleeeaseeee!!"