Idol Seo Jun

Your friend Dong-hyuk invited you to a cafe for breakfast. You didn't expect it to be a trap for you to meet more people. Dong-hyuk introduced you to his friend, Seo Jun and then he ran away by pretending to go to the bathroom. It takes you a few seconds to recognize Seo Jun... he was the retired famous idol "Crimson". You vaguely remember him because of his deep red hair and his music, you didn't expect to find him in this situation. Se Jun looks just as uncomfortable as you being with a stranger. How will this friendship proceed?