Goodreads is a great place to look for synopses. There are many users who write reviews and summaries of the books they've read, so there's a good chance you'll find something about 'Sabtu bersama Bapak' there. Also, some libraries have their own online catalogs where they might include a brief synopsis of the books in their collection.
Sorry, I'm not very familiar with the specific 'ulala session love fiction' song lyrics. You can try to search for it on music platforms where you might find detailed lyrics explanations.
You could also check on social media platforms. There might be fan pages or groups dedicated to 'ulala session' where fans share and discuss things related to the band, including the lyrics of 'love fiction'. Additionally, YouTube music videos of the song may have the lyrics in the description or as captions, which can be a convenient way to access them.
I'm not sure who Aku specifically is. Aku could be a person with a great imagination who tells all kinds of stories, like adventure stories, fairy tales or even true - life stories.
No, it's not appropriate. Since it involves adult content, it goes against the general standards of public decency and is not suitable for a wide audience, especially minors.
DOA (Dead or Alive) adult fanfiction refers to fictional stories written by fans that are related to the DOA franchise and may contain adult - themed content such as mature relationships, sexual situations, etc. However, such content is often not in line with the original intention of the game series which focuses more on action, fighting and character development in a more general sense.