Depending on the specific release, episode 10 is usually contained in the latter volumes of the German set.
German Blu-ray editions are typically noted for being "uncut," preserving the graphic and controversial scenes often censored in broadcast versions. Episode 10 Overview: "Mind and Body" School Days S01E10 German AC3 720p BluRay x264-...
If you are looking for the physical source of this episode in Germany, it is primarily found in of the series: Depending on the specific release, episode 10 is
AC3 (Dolby Digital), specifically the German dub found on local releases like School Days Vol. 2 . Depending on the specific release