Disguised as a male duke in a tragic BL novel, a swordmaster hides her true identity as a woman. To prevent the world’s collapse, a quirky princess convinces her to pose as an obsessive maniac and seduce the male lead. But the plan backfires, he returns as a vengeful emperor, obsessed with her. Soon, other dangerous figures from the original story, including her sweet childhood friend, reveal themselves as possessive maniacs too. Now, all the obsessives are after her… not the male lead.