I’m kind of annoyed the author is always pushing Hagiwara onto the readers, but it’s obvious most of us are team Hayami. But I just can’t see her being the end girl, considering what the author foreshadows.
Hamaji is coming to the conclusion that he probably has a great respect and admiration for Hagiwara that he has confused for romantic interest, but Hayami is going to help him focus on the only girl he's been romantically involved with: her.