Black Holes & Revelations (Star Trek XI, Tentacles, NC-17)

I probably shouldn't get into a new fandom id-first, but st_xi_kink has pretty much owned my soul this month.

Title: Black Holes & Revelations
Fandom: Star Trek XI
Rating: NC-17
Characters/Pairings: Chekov/Original Tentacular Character, Chekov/Sulu, Chekov/Math
Summary: No wonder we converse so well, comes the reply. Mathematics is the universal language.
Prompt: "Chekov/Tentacles" at the inimitable Kink Meme.
Warnings & Spoilers: Extremely dubious consent. If you would not read outright non-con I wouldn't recommend you read this either.
Beta Reader Gratitude Lavishment: petronelle
Disclaimer: The Mathematician and its world belong to me; Chekov, Sulu, and their universe do not.
Title From: "Starlight" by Muse

( When they are introduced, Pavel is relieved... )