Lee Donghae has a dilemma. His parents expect him to come home with a boyfriend, but his just dumped him. Not wanting to disappoint his family, he tricks a random stranger into being his substitute boyfriend.

Hyukjae and Donghae are happily married. One day, after they had an argument, Hyukjae decided to blow off some steam by going for a drive. Unfortunately, his car was hit by a drunk driver leaving him with permanent brain damage. Will Donghae keep his promise to always love him? Or will it be too much for him to handle?