I cannot remember where I read this first (either LJ or FF.net), hence coming cap in hand. It's mostly about Kurt, but there's a little Puckurt if you squint. Set in Season 1
Kurt is injured at a ND rehearsal and breaks a limb, whilst under the influence of meds he says exactly what he thinks. They're all in the hospital At first it's cute and funny as he blurts out that he thinks Puck is hot, etc. Then it gets darker; he talks about being bullied, and how it makes him feel, and he calls Shue out on being oblivious. His head is in Mercedes lap, and she strokes his hair. Rachel, Matt and Mike have been sent off to the dispensary, and when they come back everyone has sad faces, and Brittany gets the last line.
I really hope my little summary helps.