"Can’t we just take a moment to celebrate the fact that we’ve reached the six month mark rather than analyzing how we got here?" A nice quiet anniversary dinner turns into something more than that.Post The Negotiation (no spoilers).
My attempt at working it all out. This will span ten chapters and will include flashbacks to previous episodes/seasons.
Jan and Michael during Back from Vacation
A Dunder Mifflinite at home with her thoughts.
How Ryan and Pam find each other in the mess of season 3. A chapter to accompany each episode of season 3. Minor spoilers for season 3.
I know it's a little bit AU, but I'm really enjoying Pam/Ryan right now, so just go with it. After all - if you don't want to read it, just don't. No one is forcing you.
Post-Safety Training. Pam accidentally eavesdrops on a conversation between Jim and Karen. It only hurts when I laugh…
That moon-faced kid with a concussion has a conversation with "dad" (AKA Creed) Spoilers for The Injury.
She notices his eyes are shining with unshed tears and a jolt of fear runs down her spine.What inspires Pam when she's painting?
If the highlight of your artshow is the response of Michael Gary Scott, and you're thankful for that, it officially means you've hit rock bottom.
Luckily for you, Dwight K. Schrute is there to help.
It had to be some cosmic joke that, the week after her divorce was final, she ended up making out with Michael Scott in a hotel room. 
2 Angela is worried about the upcoming Gay Epidemic now that Oscar has been outed and has returned to the office after his gaycation.
Everything melts eventually, and then it all tastes the same.
Jim & Kevin, outside in the bushes during Phyllis' Wedding. Slash-ish-ish. :)
It may be a bruise on the surface, but it goes deeper than that.
Young Pam/Roy and then spoilers through Cocktails.
things happen and he can't stop wishing he could stop them
Spoilers for Cocktails
12 The beginning of Dwight and Jim's relationship, from their very first sales call together up to their latest. Spoilers through Traveling Salesmen.