+1
If it's Can't Hardly Wait vs. Primer, Primer wins. Add copious nudity, and a seriously unexpected ending, and, yeah, it's pretty great.
2013
Directed by Dennis Iliadis
Written by Bill Gullo and Dennis Iliadis
With Rhys Wakefield (David), Logan Miller (Teddy), Natalie Hall (Melanie), Colleen Dengel (Allison), Ashley Hinshaw (Jill), and Rohan Kymal (Angad)
Note: you may sometimes see this movie referred to as Plus One, but not here, except for search engine purposes—and done.
Spoiler alert: mild
