I have many theories about when Victor and Yuuri started sleeping together. This is one of them.
Closer by Halrloprillalar
Katsuki Yuuri/Victor Nikiforov, Yuri!!! on Ice, Rated Explicit, 1900 words
Developing Relationship, First Time Together
During their summer training, Victor makes Yuuri take a day off. And a night.
Read on AO3!
* with beer and a steak & mushroom pie