Hi! I'm looking for a oneshot that I've read a long time ago and can't find it now. It was about a boy who was happy with his life, had a gf and such, and one day he walked under a bridge where there was this gang, whose lider decided to took the boy, and started to torture and all that kinky stuff to the boy. Later, the lider set the boy free, leaving him totally mindf***ed.
The story goes on a little more, but I think this is enough info. If someone knows the title, please tell!! and sorry for the bad grammar (I assume I misspelled something for sure)

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Yesterday, upon the stair,
I met a man who wasn't there.
He wasn't there again today,
I wish, I wish he'd go away...