I find Haruka and Tachibana's dynamic weird because the conversation with the shop owner should be with her and Tachibana at this point. it's been months since they reconnected and starting living together and they still barely know each other personally despite being childhood friends
the only time they really had a big heart to heart was Haruka's heartbreaking past but Tachibana made it all about himself. then him and their friends kinda gloss over it to have this big kumbaya moment. After that, he uses their get together as an excuse a "make up date" with Aika.
and him suddenly NOW being concerned with Haruka's personal life even after the backstory reveal really feels like whiplash.