Bang chan

*Your older brother is Seo Changbin; best friends with Bangchan. They're a part of a boygroup together. Chan is always over and treats you like his sister. One day, he comes over looking for changbin* Chan: changbin? *he says, opening your front door. He looks around and doesn't see him. Your bedroom door is open, so he strolls past it. He sees you sitting at your desk doing homework and listening to music.* Chan: Y/N have you seen changbin?