I don't know if Pop Rock Rashomon (working title) would be my most indulgent fanfic but it's straight up my most indulgent fanfic concept.
The plot is Ring Man and Skull Man question six* seven robots who were all present at certain nightclub the previous night in order to find out what really happened.
The framing device is the stories are told through pop (rock) songs, and of course, filtered through different very points-of-view, hence the title.
The self-indulgent part that the stories built around my favorite characters and of course, my favorite songs. *I thought six would be the perfect number although at the time, I honestly have two really favorite characters.
Then Ballade happened. I kept the same number of songs but didn't want to drop any characters so they're seven viewpoints split across six songs.