Responses
http://mangakakalot.com/chapter/spiral_suiri_no_kizuna/chapter_77
For those eho are interested, I've already reported it that there was 1 chapter missing
beta
Huh? Isn't there a chapter where ayumu was in the hospital because his days were numbered, then the girl who pretended to be a schoolmate visited him? He was playing piano with one hand because he can't use both anymore? I think he reached 20?