Welcome to Japanese societyI don't mean the backstory so much so as they've been depicted and described as being close since they were children. So between that and since they live close to each other you'd think that, after the post about the stream cancellation, she'd have asked him about it. Or visited to see if something happened.
Instead she finds out either from watching Arc's stream and is relieved after finding it out by proxy. Know what I mean? It just strikes me as weird.