Lilu (2015)

Nick, a young man caught up in the party and techno world, lives in a bubble where all that it matters are the shallows of the online world, and how to "be cool" on social networks. Bored and alone, he starts talking to Lilu and get disconcerted about the fact that she actually says that she's been watching him, he turns the phone off to wake up in the middle of the night, to discover the truth.