Aand, there it is.. The trauma. The tears were really flowing for Kyoko. It's clearly just a glimpse at how hard her childhood was, but still, you can feel the pain and stress she's had all this time, having to fend for herself most of her life with barely any emotional support from the two people that were supposed to be there for her. My older sisters and I know how that feels. We only had each other, most of the time. Our parents were far too absorbed in their own things, and overwhelmed by three girls and a boy so close in age. Though we might have had it worse with an abusive dad, as well... Still don't know what kind of bad blood is between Kyosuke Hori and his daughter (pretty sure he was namedropped during an earlier chapter?). But childhood trauma isn't a competition, regardless. Trauma is trauma.
She, thankfully, has Izumi, now, to be there for when she needs it, and say what needs to be said.