The Man in the Basement
L'Homme de la cave (original)
A Parisian couple decides to sell an unsanitary basement in their building. A very ordinary, nondescript man, Mr. Fonzic, shows up to buy it. Nothing unusual there, until the man moves into the cellar and makes it his permanent residence. The couple tries desperately to cancel the sale but to no avail. Worse, Mr. Fonzic becomes a threat to their family as he befriends their teenage daughter on whom he seems to exert a perverted influence.
Starring François Cluzet, Bérénice Bejo, Jérémie Renier, Jonathan Zaccaï, Martine Chevallier, Jack Claudany, Antoine Levannier, Victoria Eber, Denise Chalem, Patrick Descamps
It's a drama and comedy movie, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Switzerland.