Heechul and Taemin have been together since their college's years. But their love was slowly getting down. They didn't feel what they did before. As they spent more days together, more nights together, they feel like their lovely energy is running away. And because of it they decide to visit the doctor who has for them a solution. At first they thought it is weird a solution. But when they meet Jonghyun, they can feel something different.