Splendor

An average, calm mid-20s girl named Veronica restarts her dead dating life all of the sudden, but with two guys: a sensitive failed writer named Abel and an airheaded drummer named Zed. At first she despairs. Then she finds a way to date both without their finding out. Then she tells both about it. Then Abel and Zed meet each other, and, after much initial conflict, they wind up living together and evolve into a very odd yet happy threesome... (imdb)