I kinda don't know what to feel about this. Aika seems like she's falling further for Wataru, but it's not like she hasn't already fallen, given she's been making such moves as inviting him to her place to meet her baby sister (this is exactly what I was saying when Wataru did his 180 and stopped bothering her: now it's on her to chase after him) and she is doing that, whenever she's not shooting herself in the foot, that is.
Wataru is being real smooth without actually realizing it, because he still places her on a pedestal that creates an artificial gap between them. Nothing has changed for him in that regard, so I wouldn't say there was any real progress this time.