There could be various non - erotica related highlights. It might contain stories about different people's life experiences, their dreams and how they overcame difficulties. These kinds of stories can be inspiring and educational.
Since the original topic involves inappropriate content, I'd rather talk about other aspects of Freunde Archives. Maybe there are great stories about cultural exchanges or historical events in it.
The black building in the cartoon could have multiple meanings. It could be a setting for important events to unfold, or it could serve as a metaphor for something in the characters' lives. It might also be there to catch the viewers' attention and make them curious about what's inside.
The manga version of Cloud Atlas has both similarities and differences. It might reimagine certain scenes or characters, but it still attempts to convey the main ideas and atmosphere of the source material.