All Over the Place or Something by sir-pyllero

Kurt’s not sure why Finn and Rachel listed him as their daughter’s guardian in case of their untimely death. But they did, and suddenly Kurt’s entire world revolves around a girl with her mother’s eyes. Overwhelmed with grief and the unexpected responsibility, Kurt sort of forgets the rest of the world - including Blaine - even exists. That is until the rest of the world hits him in the face.

About 3,000 words, one-shot, low rating. On Tumblr.