The story honestly reminds me of Evangelion in regards to how every character is a massive piece of shit. Maybe his father did love him but in the end he abandoned him. Yes, his uncle isn't excluded in the list of assholes in his life.
Mimura and his Girlfriend did nothing wrong though, so I don't think they are involved with the "every character is a massive piece of shit" list. They are just living normal happy lives, unbeknownst that there friend legit murdered someone.
so this is my second time reading this amazing masterpiece but how the hell is midori still pregnant she raped punpun before he went to highschool so what the hell maybe she got an abortion before then found his uncle when he was having his character arc maybe inio forgot but something to think about. maybe I forgot some things but still interesting.