>>31383748AZKi is the focus, yes. The story is about all of Gen 0, but AZKi is by far the biggest, especially her pecs. Reposting as a refresher...
Gen 0 hyper muscle, with focus on AZKi and focus on hyper pecs.
Try a comfy fic with Gen 0 (AZKi, Sora, Roboco, Miko, Suisei). I notice they don't get a lot of love as a group, but from a fiction standpoint if might be interesting to see their personalities bounce off of each other.
This, but it's a bodybuilding contest. All five girls have muscles bigger than the Incredible Hulk, especially gigantic pectorals. They're all hanging out backstage, casually chatting and lifting impossible amounts of weight. But it's all light-hearted and cheerful. Lots of flexing to show off for each other. Then they each take the stage to do their posing routines, all growing with each flex, then the final posedown together on stage.
My personal preference: AZKi wins, she ends up getting bigger than everyone else with even bigger pecs, but she's humble and honored to be on stage flexing with her honored friends.
The core of the story was about AZKi, Suisei, Sora, Miko and Roboco all growing ridiculously gigantic muscles, especially their pectorals, with AZKi being the biggest and most pectacular by far. Tons of flexing and showing off and posing, pressing muscle against muscle, maybe some very light les stuff between AZKi and Sora, and ending with my favorite, AZKi, just outpecflexing everything. And some interaction, dialogue, etc, to show off their peronalities and show they're not just empty YCH. Something that could have been easily done with a simple bodybuilding contest and concert or something.