Yeo Eun Ho and Cha Do Hyeon have been friends all their lives. After 19 years, Eun Ho seems to have a good grasp on Do Hyeon, even knowing that his “perfect” image at school is a façade. But what Eun Ho is absolutely oblivious to is the fact that Do Hyeon has had an obsessive crush on him for years. Though Do Hyeon has been able to keep it a secret in order to slowly ease his way into Eun Ho’s heart, the sudden arrival of a new student named Kwon Yi Hyeon throws a wrench into his plans. What will Do Hyeon do to keep Eun Ho by his side? And will Eun Ho ever realize his best friend’s feelings for him? ~~ Adapted from the web novel "Summer" (하절기) by Iiromill (이로밀).