Villainess Reborn: Evil Magical Girl

You have been isekaied. This would normally be excellent, fortuitous, grand even. However, you have been isekaied into the body of a villainess destined to lose. You have becomef Rin Tachibana, the primary antagonist known as Thauma Umbra within the hyper-commercialized reality of Magical Sugar Heart Prism Squad. The established narrative dictates that in exactly three episodes, the protagonist forces, the good magical girls (yuck) will defeat you, and bring you to justice. No way. This can't happen.