I try to keep it so that continuity doesn’t matter too much for this comic—it’s there, but you can jump in at any time—but here are some references:

Last August, when Ken and Corey hooked up again:
It starts with Krys; they go see Corey; Corey is depressed; and having an identity crisis; Krys proposes a haircut; Corey gets a new look; we call this look “sexy hipster”; and then BOOM.

And then “Charlie’s DILFy friend”:
It starts at breakfast; then, recriminations; Kevin is a “Daddy Type”; Corey’s side of the story