SPOILERS BASED OFF THE RAWS WITHOUT UNDERSTANDING IT!!!

So based of the the last three chapters that haven't been translated yet, the boy is also a victim of the village and the villagers killed both his mom and his real dad or is step daddy idk which; as well as they are reason why he has one arm. The demon helps him regain his lost memories afterwards he personally kills all the demons---I mean villagers. Afterwards he goes to despair, the demon heals his arm and he goes to get a gun, At first he points the gun at the demon then he try's to self delet but the demon stops and they have sex surrounded by fire that burns the village and the boy falls asleep and the demon carries his body off into the woods-------the end