When the opportunity presented itself, sleeping with his long time crush while on a tour in thailand seemed like a dream come true for Sungyeol. The next morning however, when he realizes that a drunken one night stand with his best friend perhaps would be more correctly classified as a nightmare, and that he had just risked seven years of friendship and the future of infinite for one night together, he starts to rethink his decision. But whereas his head wishes to have it undone, his heart keeps wanting to further cross that line between friendship and love. The question is, would Myungsoo be up for being something more than friends, or would he regret their night together to the point where even maintaining a friendship would be impossible?