I kept thinking of Bandai telling shichiku that he attracts bastards like himself? (can't remember the exact wording)
This is so true. Shichiku 's girlfriend, Bandai himself, and I'm thinking Nagisa was pretty twisted himself. Something wasn't quite right in the head for him to be okay with that.
My mother was in an abusive relationship and only after years of counselling does she understand that she thought she deserved it. Trauma from your past can make you think that this is all you deserve. I don't know what happened with his alpha friend but it seemed to traumatize him.
I have a feeling that narumi (from first story) is more twisted than he appears. At one point I thought that maybe he was aiming for AO...
Second story I hated the seme at first. But he redeemed himself when he told sweeper kun to mind it.
http://www.mangago.zone/read-manga/katakoi_opera/nbt/0c6434e7c21d8115/Vol1_Ch45/6/
Being open in their relationship, especially when it started so bad, was a very good move on his part and showed he wanted to redeem himself. At least that's how it seemed to me.
I thought he was gonna demand more diamonds and only then would he say yes.