tbh i'm a bit disappointed with the ending and the direction it took in the later parts in general. i would've loved more focus on interactions with the ghost instead of all these side characters, rivals, and what not.
how come after getting over the initial shock/fear neither mc nor ghost-chan made any more serious attempts at communication? i get that he wouldn't try that in the presence of his crush so as to not seem crazy, but why not when she was asleep, or even in a nearby room or such? the ghost showed that she could go to separate places from the girl on a few occasions. and sure, she could not talk, but she could've easily pointed to letters or something to have a decent conversation. in fact, at some points she even demonstrated she could send images and text to his phone, so why didn't they make use of that more?