With Kang Taehyun's luck he was seated next to the troublemaker, Choi Yeonjun in class. Because of a petty action a rivalry started between them. One day, Taehyun was moving to another country and wanted to finish his old Bucket List he made. It was supposed to only be him doing it. But. . . . Little did he know that Choi Yeonjun would also be joining in on his alone trip.