ChatGPT failed to find this manga I'm looking for, but here's a nice summary of what I fed it that it fucking spat back at me and called Koe No Katachi. Can anyone help me identify it?
>This psychological drama centers on a man whose wife becomes emotionally distant and abusive after a traumatic event during her pregnancy. The couple has a daughter who is raised by the mother to be indifferent towards the father. A literal line is drawn within the house, symbolizing the emotional and physical boundaries imposed by the wife. The father, in an attempt to reconnect, starts a radio channel where he creates riddles, unknowingly solving problems that his daughter faces. The daughter may be on the autism spectrum, though this is never explicitly confirmed.