From the various comment i've read after finishing reading this manga, I guess i'm the only one who was a little bit unsatisfied with how it ended, but seeing its length it kind of make sense, yet i wished Hiro would have felt a little bit more distant with Kei, and Kei doing anything to make it up for it...but either way, it ended so I can't do anything to change it so why not enjoy it?
Akai Ito No Shikkou Yuuyo