In Sachen Adam und Eva (1971)

Adam Schmitt and Eva Müller met, fell in love and wanted to get married. On the day of the wedding, however, they don't end up in the registry office's wedding room, but in a courtroom. The subject of the trial: their love! Adam and Eve have to prove that they really love each other. If their proof is authentic and convincing, their application for marriage is to be approved by the court...