Get out the way, ugly stepsister, it’s the rise of a brand new girl-crush sister! The evil stepmother? No, no~ it’s the arrival of a stepsister, with a new concept! Zabotte, who came from the countryside, became the daughter of the grand Winchester family. However, right after she inherits the fortune, she collapses due to poisoning. At this time, Zabotte discovers her adoptive sister’s innocent heart. Zabotte, who just barely survived, meets the mysterious young Merrick at the ball. Circumstances lead to Zabotte having a chance meeting with a management teacher, and she discovers as she studies that the estate management that she left to her mother is a mess…