It's there to tell the audience : Satou is not a lolicon. Anime spent almost 10 minute just for Satou char building irl. Which is surprisingly good. I'm happy it isn't rushed unlike a certain Overlord, NGNL, SAO. Knights and Magic.
It's a good thing. Remember that the novel most of us read was the WN. Where it's simply a draft but in novel form. If there is time to clean up the story, it's in the LN ( which is to me.. worse than WN ), manga (ok) and the anime (which is going in a good start).