SISV 

SISV is a shortening for Since I Saw Vienna which is an Ao3 Fanfic written by Nicholenarrates. It's a tommyinnit-centric superhero fic and it has been known to ruin christmas's by being updated on Christmas day with an extremely sad update.

"Have you read the new SISV update?"

"No I haven't!"
"You should soon, it's a really good one,"

SISV by GeoArchelle January 5, 2023