Yoogun is trying to escape reality. It’s a tragic tale.

For those who don’t understand the sudden shift in the relationship between the main couple: I believe Yoogun is looking at blondie not as the disgusting evil thing he is but as a salvation board, if blondie disappears he will either kilo himself or drawn in emptiness. His brain is in survival mode, it’s a sad situation, mc is gaslighting himself into liking blondie because he already knows and is familiarized with the pain Blondie brings, it’s a known evil, if he repelled him, the other option would be facing the pain, loneliness, GUILT he feels over the passing of his beloved brother.