I think so too, i think we could have at least one more episode. Everything happened very fastly.
I agree with you! I get it why they didn't show the investigation process with the real killer Because it will need so much time to show it in detail π and besides the murder case and the killer is not the focus of the story. it's about HyunSoo's survival inside the prison and the poor judiciary system. I personally like how they end it, no fillers, less drama, direct to the point!
I really enjoyed watching OOD! next episode please I can't wait!