Volley (2015)

Six twenty-something friends are spending New Year's Eve at a summer house at the river. The host, Nicolas (writer and director Martin Piroyansky, XXY), brings his ex-girlfriend Pilar (Inés Efron, Empty Nest, XXY) with whom he just had a one-night stand. But, Nicolas hits on every other girl including the brooding Cata (Vera Spinetta) and the voluptuous Belén (Justina Bustos). When Nicolas unexpectedly falls into bed and then into love with the high-strung Manuela (Violeta Urtizberea) who also happens to be his best friend's girlfriend, the last laugh is on him.

Source: TMDb