M/M fic involving a bully, his victim, and rope(?) that he bought from a magical store

[Guest guest]

I read this one a while back and can remember snippets of the plot, but I cannot for the life of me remember the title or author.

It was part of a series centered on this store where the bully/main character bought some rope or twine or something along those lines and eventually used it to tie his victim to the bed. Apparently it was all just a dream or mirage since after it was all over, the victim disappeared, but said victim showed up to school the next day and seemed to have remembered what happened.

I'm so terribly sorry for the vague description. Any help at all would be much appreciated.

[Guest Robin]

http://original.adul...hp?no=600102537

[Guest guest]

That's exactly what I was looking for! Thank you very much!