ngl i didnt pay attention, what happened...
He originally broke part of the necklace that the reaper has. He’s the reason why the necklace is completely gone and why the reaper needs to steal one
He also pushed Seowoo off a cliff
The person he was in charge of was super bright and happy and the reaper didn't want to reap him, so he changed his fate by basically killing his brother and moving his soul to the brothers body and the guy was confused since fusing with his brother and lost his spark. And now the dude the reaper was in charge of cant even be reincarnated cause even though he didn't do it directly he still messed with someone else's fate.
I still can't get over the long haired reaper doing that, he definitely deserves what he got, maybe not even enough. I thought his back story was gonna be cute and it filled me with rage.