I thought it was a bit weird when Sachi said she was going out for food with her friends and wasn't immediately like "Ayari, you're coming too, right?" But I still really enjoyed this chapter because it's a great way of showing what it looks like when Ayari spends time with someone as a Close Platonic Friend, and how it's super different from when she's around Sachi.
I mean, look at all the things that didn't happen! They got ice cream and didn't share any of it! They made dinner and Eri didn't get dazzled by Ayari's cooking skills! Ayari got dressed up in new clothes and didn't get flustered or embarrassed - until it was time for Sachi to see her! It's like they're drawing a very deliberate line between Cute Girls Doing Cute Things, and the special atmosphere Sachi and Ayari have together.