beta
Ma boi, Iwai, I know you're in love with her and concerned but honestly, bringing up something from 2nd grade isn't proof enough. You nailed it but MC can easily deny cuz her nii-chan truly has been harmless to people so far. There's a reason people flock to him and it's because he's good in pretending and acting nice despite being a psychopath. Plus, she's doing her best to keep him being "kind" so saying he isn't surely terrifies her. It's unintentional but that will definitely not endear you to her.