Title: Kinks in Development
Jaewon's life has been pretty smooth since moving in with his casual sex partner. In exchange for sex, he's fed, clothed, and housed without having to do much else, which is a great deal as far as Jaewon is concerned. He spends his days idly until his partner asks him to sign up for martial arts classes at the dojang he works at. Jaewon isn't interested, but if that's all he asks, he could do that, at least. He joins a class, inadvertently joining under the tutelage of a former classmate, Jung-wook.
For whatever reason, Jung-wook seems to have it out for Jaewon, not that Jaewon is making it hard for him. Jaewon is lazy and self-important, spending class time napping or playing around, and while that's enough to draw the ire of Jung-wook, the reasons are so much deeper than that. Jung-wook and Jaewon got close in middle school, far closer than friends. They kissed and shared some of the most intimate moments of their lives, both when they needed it the most. Jung-wook was ruthlessly bullied and tortured in school, and though Jaewon never came to his defense, he often lessened the bullying as much as he could by hanging out with the bullies. Jung-wook was fine with this arrangement, and he was fine even when Jaewon ended up spreading a rumor around the school, making the bullying worse.
What Jung-wook couldn't stand was Jaewon moving on and abandoning him. Jung-wook wants revenge, and he's willing to give Jaewon his body if he can get revenge. What Jung-wook doesn't know is that Jaewon doesn't remember anything about his betrayal. He hardly remembers Jung-wook at all, and he's all too happy to go on this lusty ride of vengeance.