I feel like the author kinda wrote himself into a corner a bit about the confession.
If Manbaki actually confessed, whether Tadano accept or not, the outcome won't be pretty and a lot of readers aren't gonna be happy with that.
Also, I want Fuwa (the chubby girl) to has more screen time.
This makes me more curious about how he ended up adopting her.
I've always thought he's adopted her when she's a bit older than a baby but that's not seem to be the case.