The Gamer Girl [FNiA Fem Harem x Fem Reader]

(Y/N) (L/N) - genius, billionare, playgirl, philanthropist. A very young billionare in this world, who owns companies that creates prosthetics that can fully replace any limb, that can create animatronics for different needs, etc. Almost everyone says that she's a Tony Stark in the flesh. However, only a few people knows the true nature of (Y/N), who isn't her butler or maid, and they promised her to be her good friends, until they die.