Lumière noire

While she barely knows him, Tris, a 20-year-old girl, falls in love with her next-door neighbor, Aren, in her twenties as well. After a hot afternoon spent together, Tris invites her to spend the rest of their summer vacation with her and her two friends, Ben and Drew, in a lakeside home. Aren, the newcomer who will train this quartet will then start to seduce these three people and cause trouble between the three friends. To leave a question unanswered, but who is this Aren? Where is he from ?