Checkmate {Side Stories}
When he was just a student, Soohyun Lee, ranked second, feeling envious of his classmate, Jung Eunsung who ranked first. Although he tried catching Eunsung, his soul aflame with passion, it wasn't enough, and he lost all his motivation upon graduation. As time passed, Soohyun forgot everything. However, when he saw Eunsung collapse for the first time, he felt extreme pleasure. With his obsession for Eunsung rekindling, he has a desire to see him fall even further in-front of him. But as this side stories start, the romance between the two of them started to bloom with them finally living happily together.