Born into a distinguished noble house, the young lady Claire grew up without a single setback or hardship. With peerless beauty and a beloved fiancé by her side, her life was truly smooth sailing. That pristine life shatters when she carelessly breaks a tarnished jewel mixed in with imported gifts, unsealing an ancient succubus. As a parting gift, the spirit afflicts Claire with an insidious curse: she will be plunged into uncontrollable estrus, binding her lust to the very next person she sees. Overconfident in her pride, Claire assumes she is safe, believing only her fiancé would ever visit her private quarters.

But when an insolent manservant she usually treats like dirt wanders into the wrong room, Claire catches sight of him—and the curse instantly ignites her body with burning desire for the very lackey she despises. The curse will naturally dissipate in 10 days, but it feeds on male essence. To stay pure for her fiancé, Claire must explore dangerous ruins, craft alchemical countermeasures, and duel her servant daily to keep his lust at bay. Will Claire endure the 10 days with her noble pride intact, or will defeat drag her down the path of complete corruption and NTR?