The Warblers don't know everything which happened to Kurt at McKinley and before. Drabble series, not in strict chronological order, more or less canon-compliant.
Nobody here is dead, exactly. Because Little Pete did it. (Possibly the first ever Doctor Who-Gone crossover.)
The first time Kurt and Blaine met, they were kids, and Kurt was hurt, and Blaine was hyper, and Cooper was extremely patient. Of course neither of them remember it.
Fifteen years later, and everyone has grown up. One day, a face from the past returns. One-shot because I was so annoyed that Zach died.
Roger's recovery from the FAYZ and his reunion with Edilio. Because even something burnt to charcoal can be used to draw.
Alice gets a new car. Bella is less than impressed.
Clara has saved the Doctor countless times. Sometimes he speaks to her. Sometimes he doesn't. And sometimes nobody even knows.
Three young boys. One of them is dying.
All love stories start the same way. Once upon a time, there was a girl with clear blue eyes and fine blonde hair like sand on the beach. She is old now, but she remembers how it used to be, and she remembers what happened to her. This is her story, why she volunteered for Annie. Because not all stories end happily ever after.