I would like to ask for your opinion, but I haven’t written any chapters yet since it’s only a concept that I’m not sure will ever be brought to life, so I hope for a limited assessment if possible.
The story itself is set in modern Japan. The protagonist is a high school girl who’s secretly a magical girl after hours. But here’s a little twist: she’s not an ordinary magical girl in fluffy pink clothes who saves everyone from trouble, no. She’s actually mischievous and cynical, and uses those powers only for her own entertainment.
The school she goes to is a prestigious academy for girls, and naturally she’s a quite popular figure in her class, but that’s only a front. She actually lives in an abandoned building because… she doesn’t have any better place to go. She doesn’t have parents obviously.
As for why or how those powers exist and work, or why she doesn’t live in a dorm instead, that’s not important since the story is meant to be a parody with slightly serious arcs every now and then.
In the first few chapters, she comes across two another magical girls and makes them her comrades, of course after fierce fights. One is a girl that wears a mecha suit (human-sized), but the protagonist manages to destroy that suit. It turns out that she’s a frail little girl that believes to be the antichrist (basically a chuunibyou) and intends to destroy the world. They pair up since their plans somewhat match, but their mission for now is to somehow repair that suit.
The other girl looks more like a magical girl because her outfit is fluffy and pink, but don’t let her looks deceive you. She appears to be quite sadistic and tough, she even manages to knock the other girls unconscious. She has big titties for the sake of fanservice (the others are flat, by the way. I wonder if there is any point to that in a novel that has no illustrations). Upon being tamed, she’s surprisingly down to earth, and it turns out that she’s actually a forlorn gamer. She has wings that not only allow her to fly, but they can also create a space the size of an average apartment where she often shuts herself in. It becomes the team’s headquarters.
Their goal is to destroy the world.
All relevant characters are female, and there will be girls’ love.
Some tags I picked that could describe the story: All-Girls School (but that’s only a subplot), Chuunibyou, Delusions, Evil Protagonist, Magical Girls, Modern Fantasy, Multiple Identities, Mysterious Past, Sadistic Characters.