Schluss mit lustig! (2001)

Felix has grown accustomed to heartbreak, experiencing a three-month relationship cycle followed by grief, but he always has his flatmates Moritz, Jan, and his sister Regina for support. When Jan moves in with his fiancée and Regina cancels a planned vacation, Felix is left alone. Moritz, who is constantly dealing with his girlfriend Leandra's problems, decides to help Felix find a straightforward, understanding, and independent partner. His first attempt leads him to Maja, who is wary of relationships but open to an affair – though she doesn't mention her seven-year-old son. Ignoring Moritz’s warnings, Felix falls deeply in love. However, learning about Maja’s son, Paul, he panics. Only Paul knows his mother and her new boyfriend are a perfect match.