I'm kind of disappointed that they resolved it positively. Maybe "disappointed" is the wrong word because I still really loved this ending, since (1) it's still realistic and (2) happy endings are nice; but I can imagine an alternative timeline where Yugami, even if he would probably feel bad for Chihiro, doesn't consider her his friend still (not that he outright says he does even here, but it's implied).
What if Chihiro's thought ended up being right?