I hope the child friend loses. Both of them. Noe is the cutest, this episode further proves that.
Before the Ai scene, Shin asks Noe to go out with him, even going as far as saying he likes her and writing it out on the ground. It doesn't seem genuine of him though, because before that, Jun threatened to break up with Hiromi if he doesn't go out with Noe.
I don't care about the inevitable drama that will ensue. It will all be justified if Shin chooses Noe.