I'd have gotten in with her without a second thought.
Btw, when Rihito says "I'll borrow you some clothes." It should probably be "I'll lend you some clothes." Since Noa is the one borrowing. Correct me if I'm wrong.
I'm still not sure how much of it is intentional on the author's part, but Rihito is the best Demisexual representation I've ever seen in manga. He more or less spells it out this chapter that he's essentially never interested in anyone, but it's obvious that Noa is special to him and the longer things go, the more interested he becomes, just like demisexuals IRL.
I don't know about LN or stuff like that and also the fact that it has the romance tag, but i do think there's a possibility that this manga never goes full romance between them, like i could see a last chapter where they just drink together as friends