Responses
I don't think Ryou have attachment to Konomi as a child to father either. Ryou's first memory of meeting him, he saw him as a cool guy, maybe some adoration. He himself said he never feel his affection as father. So on the time slip the longing and adoration move it's direction quite quickly.
It's like finding your current partner that you met in tinder actually your long lost sibling :") fuck that sad
The whole point of the timeslip is to make them met first as equal long before they're father and child. Then to rise questions regarding taboo, why it's bad what's more important. Beside genetics one of it because in such relationship they couldn't be equal but this plot device bring it out of equations (kinda). Ryou knew but said fuck with it cs he's a child himself and didn't see himself returning. It must've been hard for Konomi...
Fiction is amazing