Given the popularity of the 2021 film, the vast majority of searches for "spielen wir liebe ganzer film" are for the newer Emilia Schüle movie.
There is an older Austrian film with a similar title: (2006) by director Michael Satke. It is a low-budget indie drama about teenagers experimenting with love and role-play. This film is much less known and rarely searched, but it could surface in some queries. spielen wir liebe ganzer film