My Hidden Champion is Tracking My Soul

Transmigrated into a dark fantasy melodrama, Tassia Vendramin’s first act is to spectacularly ruin her own public dumping. Instead of weeping, she loudly critiques her ex-fiancé's poetry before strutting out of the gala with the banquet's prized roast boar. Her grand survival plan? Buy the novel's future world-destroyer - a half-starved boy named Renzio from the brutal Sanzanar underground fighting rings - and hide him in a cozy countryside greenhouse, entirely away from the main plot. For years, they fiercely compete over everything from tomato harvests to fishing, building a sweet, bickering rivalry. But when Tassia sneaks into the capital to help the original heroine, Fiorella, she returns to find her estate empty. Five years later, the fearsome leader of the new ruling faction - and Tassia's biggest political rival - turns out to be a towering, dangerously handsome Renzio. Worse, he’s secretly the mythical 'Abyssal Sovereign' Fiorella was supposed to hunt; the two major plotlines were actually just Renzio hoarding magic to weave a permanent tracking spell into Tassia's soul. Will Tassia realize her sweet, competitive childhood rival is now an obsessed tyrant before he permanently locks down her heart?