Jackson and Youngjae used to be a ‘thing’ back in high school and their relationship last for 2 years. Both of them decided to break up when Jackson got into Seoul National University and Youngjae was in his final years. For 2 years period, they didn’t see each other but their feeling towards each other were getting stronger. The feeling of longing was lingering and they just ignored it. They thought it was a puppy love until they were destined to meet and fall in love with the same person again.