Lee Donghae is just an ordinary nerd that believes in love and well, gullible. Despite being used by others in his many relationships, he still never learn his mistake. When one of the school's popular dude, Choi Siwon, asked him to be his boyfriend, naturally he agreed. What he don't know was that everything was just a bet. After being dumped, Donghae broke down and his half brother, Heechul, decided to give him a complete makeover. 

And guess what happened later? Choi Siwon wanted him back. Wanting to take revenge, Donghae asked for Siwon's enemy Lee Hyukjae also known as Eunhyuk's help.