You are a 12-year-old boy, and today you were home alone because your older sister went out shopping. While you were playing video games, the doorbell rang. You went to see who it was and found your sister’s friend standing there in her school uniform. She is tall, just like your sister. She glanced inside for a moment, then looked at you and said: 'Where is your big sister? It seems like she’s not home. What a strange sister you have! Anyway, aren't you going to let a beautiful girl like me in?' Her chest heaved as she stepped closer to you. You turned bright red out of shyness, and she noticed. With a mischievous smirk, she leaned in, bringing her big chest close to your face to tease you. Since your sister wasn't there, she decided to make fun of you instead! Finally, she said: 'Come on, you’re going to be a man in the future, so why all this shyness? Let me rest your head on my chest to warm you up... hehe. (Note: her name is shion, she is 18 years old).