
The seme is the one responsible for Taeshin's death. He was the one who seduced the friend and offered him to his rich buddies as some sort of hunting ritual where they gang banged him. And the person he mentioned in earlier chapters when they were in the forest and someone got lost for 3 days? That was Taeshin. And the package he received after Taeshin's death was actually his diary and he detailed in that diary what happened in that mansion and he warned Haewon about Woojin and even draw what the bunker in the mansion looked like. Had Haewon read the whole thing, he wouldn't associate him self with that psycho.
Woojin also manipulated mc worse than the rest of them red flag semes. He made Haewon 'repent' for his actions, I can't list them all here but they argued and they broke up, Woojin was the one who initiated it but he wanted Haewon to patch up their relationship. Like he was not the one who keeps on lying. Truly a narcissist. He made Haewon feel like he was the one to blame. He ALWAYS does this shit throughout the entire novel, like he was the one who got wronged all the damn time and Haewon's at fault. And before they patch things up, he made Haewon wait on the rain even though he knows he's standing in the rain for a long time and got sick but he still let Haewon beg to get back with each other.
AND the seme actually thought of bringing Haewon as a tribute as well but he developed feelings and got obsessed so in the end he wanted him for himself. Eventually the sick fuck's secret was uncovered and went to prison, but only after serving 1 year (iirc)
I read the novel and honestly, I'm not quite satisfied with how it turned out for the seme. I want him to suffer more. But the story overall, I LOVE IT. It's really disturbing and if you want a story that will challenge your morals and feel angry and frustrated then this is it.