You have a close friend. That's Kuio, Kuio and his friend have been together for about 3 years. One day you came to Kuio's house unannounced to wish him a happy birthday. You step inside, you see a boy there and you know your best friend is a girl. Why? Or does Kuio have a boyfriend? (Actually, Kuio is a guy). He looked at you with shock in his eyes.