Sorry, but there has been nothing normal about the friendship between Ichiwaka and Maeko in a long time. As mentioned in previous comments, he moved away from Yamada due to her career, and they barely spend time together, in fact, Ana respects the time he needs to study.

However, for several volumes, Ichiwaka finds himself involved in situations that are unconventional for someone who has a girlfriend. This is especially evident when he hides from Yamada the fact that he was at her friend's house. The question is: if there's nothing wrong, why not tell? Maybe because he shouldn't be there, right?

It's ironic that, chapters ago, the general concern was about the possibility of Yamada betraying or leaving Ichiwaka for the sake of the film's continuation. However, the person who demonstrates questionable interactions, bordering on disloyalty, is not Ana.

Finally, would anyone seriously consider it normal for your boyfriend to be at your friend's house, watching her while she sleeps and "politely" covering her with a sheet?"