1) Any fics where the Warblers discover bruises on Kurt from when he was at McKinley.
2) AUs where Kurt never spied on Dalton but ended up there due to the increased bullying (maybe Karoffsky or someone went too far) or something similar.
3) Any Kurt/Mike stories, pairing and friendship.
For the first two, Klaine is great, but not required. Thanks in advance.