not trying to hate bc this was genuinely a good read and the art was nice, but the pacing really felt all over the place here. this oneshot just doesn't do these two justice when it comes to yume's illness and haruchii's inability to hear her piano. there's so much going on that the impact isn't as strong as it could be; there are also some plot holes that need some explaining (if yume literally told haru she was a ghost the first time they met, why is haruchii so shocked at the end when she realizes yume really is a ghost?)
in conclusion, i demand a visual novel. i think it would be the perfect opportunity to retell the story with greater detail :D