Rename the subtitle file (e.g., patch.ass ) to match the exact filename of your video file (e.g., animation.mp4 and animation.ass ). Keep both files in the exact same folder directory.
To understand the need for a "patch," one must first understand the release structure of adult anime in Japan. Due to strict Japanese censorship laws regarding the depiction of genitalia, studios are required to heavily censor their official releases. This usually involves digital mosaics or pixelation. ano danchi no tsumatachi wa the animation patched