
I don't remember the main killer name but I feel he's of the type who targets guys whose partners are piece of shits and studies their behaviour/makes them on his side while feeding his "crazy" side of killing people so that the partners wouldn't feel bad for him as he's punishing them on their behalf. Also making money by writing novels on these things.
Same with ah-in and the other guy who got hit.
I feel ah-in is interesting to him since he goes as far as acting blind to buy things for his bf. The killer things highly of him and "loves" him??
All in all, fcked up shit nonetheless

Now that he doesn't specifically knows what his mother thinks, he'll grow restless until he hears what she actually feels. She's the driving force that can control his emotions, his feelings as an individual.
All this while I guess he was able to keep her thoughts away and suppress it, since she was away from him, but now she's come back. I'm afraid he still seeks her validation that he's a good son to her.
God I want to break my wall(╯°Д °)╯╧╧
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHH