Hahahahhaha - that title is MADE OF WIN. *giggles* Generally, this whole thing is made of win - Harry/Teddy! And OMG HARRY/PERCY, I LOVE YOU.
All the little details are fabulous - Teddy working at Flourish and Blotts (such a Remus thing!), Andromeda & Kingsley (I love the idea - poor Andromeda being left alone but for Teddy was one of the more tragic things in DH, I think), and, well, everything about Percy :D