I'm not going to spoil you much. But Wooweon has serious issues. But after some angst he confess to Inseop. Then the two of them become just all lovey dovey. In the extra chapters of the novel because of Inseop's shyness, and not low self esteem they again had some misunderstandings. There is one incident like he thought Woweon is sick in the head so he might blow up and cause some incident which might hamper his career. That's why he try to deal with that glasses jerk alone and end up in hospital. Woweon blamed himself for Inseop's condition as Inseop didn't clear what actually happened, then breaks up with Inseop. But then again since he's practically a psycho and can not live without Inseop, Woweon end up in asylum. But somehow Inseop track him down and they resolve everything more or less. He's now piece of shit and sick Bastard but later he will still be a sick Bastard who loves Inseop a lot! But yeah it's a long road ahead xD
The main issue with Woweon is that he's literally incapable of feeling emotions. It's an illness he was diagnosed with when he was a kid. He's only surviving on pure instincts such as hunger, anger, hatred etc. People doing something selflessly for someone literally doesn't make any sense to him. He always thought there's some kind of motive. That's why he was shocked by Inseop's action. He's still skeptical about him being genuinely a good person. Every action he takes is very calculative. He knows how people like to perceive him that's why he maintain his public appearance. But he can't do that with Inseop. I liked his character for such complexities. At one point he tells Inseop that "I thought I was broken in head but Inseop broke my heart" I felt really sad. Like he wants to love Inseop like normal person but he just doesn't know how he can do that. He's still sorta manipulative and calculative on how he can keep Inseop to him but it gets better. But, in reality I really feel bad for him tho :')

Those who know the novel can spoil this?!. I know the last chapter is 74 from the raws. But I need further spoilers (=・ω・=)