>>607310I can only remember the plot, I read it 5 or 6 years ago when I first started reading manga online.
The art style was good, the backgrounds were detailed, the characters weren't as good but still really neat. The last scene had the main character sitting in a grassy river bank dressed in his winter school uniform and the box cutter in one hand. I think I saw this last page on /a/ years ago too.
I think I'll go through the whole one-shot section of the site I read it to see if I can find it. I'll do it as soon as I wake up.