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The brother isn't malicious. He really just wants to be friends/maybe more? with her because of how she helped him back in the day. The girl who her ex cheated on her with, is a classmate of theirs who was obsessed with older bro and didn't like our main girl. Big bro tolerates her but doesn't know the connection or something. Something happens, big bro backs off and our girl and issei get closer. This was someone's translations of future chapters but they said their Japanese isn't great so who knows. I could be totally wrong.
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literally everyone has been like, yep, definitely his kid. I really wish Felix knew but was waiting for Issac to tell him. like, he's still upset that Issac broke his arm but maybe he can make up for it by telling felix himself that Benjamin is his kid. or maybe he is just in hardcore denial because it would mean that Issac is that omega. but, most likely, Felix is just kinda dumb.
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Seme kinda feels like Yashiro (twittering birds never fly) for me. Not completely, but enough to know he probably has a depressing backstory where he just detached from any kind of human connection and is scared of it but doesn't really realize he is. Doesn't really feel anything for anyone and just goes with the flow of the other person's wants and needs. I've said it before, seems like he has a need to fix people in order to feel that he has some type of control in his life. Whether it's helping people he works with or the people he dates.
At least Shouma knows that she isn't someone that can be "owned".
I'm just waiting for her to beat the shit out of them...lmao can imagine her YOU SHIT HEADS STOP