Responses

True, maybe he wasn’t holding his bloody sword directly over the dead bloody father on the ground, and it’s just because of perspective lol.
(All jokes aside, the evil spirit thing kind of makes sense. Maybe the spirit killed his mom so cheonma had to kill him, and then he decided to take care of his friend’s kid as his final wish or something. However, the misunderstanding happened, and he didn’t correct him(maybe he saw himself as “dirtied” too because he killed his friend, so he wanted ryeon to grow up and kill him))
So it is revealed by Ryeon himself that his father and Cheonma are friends. I'm betting he's not actually the one who killed Ryeon's parents. Cheonma raised Ryeon as his successor not thinking that Ryeon will get his revenge because maybe he thought Ryeon knows what's up. CHEONMA EXPLAIN WHAT HAPPENED THAT NIGHT U STUPID BITCH.