There was one I remember specifically where it flashes back to Rachel makes a list of people to invite to her 13th? Bday party and Blaine is thinking, she's delusional if she thinks anyone will come. Then he says, "Then invite me."
And she writes his name down on the bday list.
The second fic is also Anderberry siblings. Blaine is secretly dating Kurt and Finn and Rachel's dads find out first.