Choi Minho has been tortured by a nightly visitor since he was a child, depriving him of much needed sleep. It knocks on the window nearest to his bed, seemingly calling him to the window. But he never answered the call, he was too afraid to move from his bed, paralyzed by fear. Minho never dared to meet the eyes of what was knocking on his window but tonight was different. H

Dong Wook is alone in his house with nothing to do. He decides to call over his long time neighbor and best friend - Choi Seung Hyun - to play video games with him. But they both soon get distracted with each other. One thing leads to another and they can't go back. Will these two best friends form another type of relationship between them?

 JiYong and Seunghyun have long ended their relationship, but Jiyong can't help but miss the time that they spent together. He knows that he has no chance now due to Seunghyun being happily married. He wouldn't dare to ruin that for him, it just wouldn't be right. But he constantly finds himself thinking of what could've been. And today was another one of those mindless days where he had nothing to do but think.