Isn't this kind of a retread of the festival arc from the main story? She said she got to experience something she didn't when she was in that cosplay and sang with Uruka's group.
Not surprised she's so tech savvy. She did take a selfie of them sleeping together when she was still a baby. That particular chapter is still one of my favorites.
There's a lot of sympathy for the father, but didn't he run out on both of them a dozen or chapters back because both the mom and Seichi were being weird as fuck? I get that living there is beyond salvation for him, but he could've stayed and tried to help her through this. She obviously went...