PoT Fic: "Punchline" (3/3) (Atobe/Shishido/Oshitari)

Title: Punchline (3/3)
Pairing: Atobe/Shishido/Oshitari
Rating: R
Summary: Birthdays. The Big Three-Oh. Part 3/3. Part 1 is here. Part 2 is here.
Warnings: Rude language, some sexual content.

( Punchline. )