The moment Lady Sabrina, a duke's daughter, met her cousin Ciel, who had been taken in after her family's ruin, she remembered everything.

—that she was the "villainess of an otome game" destined to be ruined by Ciel.

Even if she tried to avoid ruin, the flags were already firmly in place. If there was nowhere to run, she had no choice but to embrace it.

Sabrina, having resigned herself to her fate and tried to fulfill her role as the villainess, found things taking an unexpected turn when she accidentally stumbled upon Ciel's secret...

Shockingly, the true identity of Ciel, who was supposed to be the otome game's heroine, is a cross-dressing boy!?

"I will definitely make you mine. Be prepared—Onee-sama♪"

(Also available on Kakuyomu and Novel Up Plus)