Bound by a verbal Arranged Engagement Pact from childhood, Bryan Yates travels to the Stirling Household to fulfill his late father's last wish. Though he appears to be an ordinary rural youth, he is secretly the mysterious CEO of Horizon Group. After moving into the Stirling Household, he faces scrutiny from the seven sisters and deliberate difficulties from Aunt Alicia, and gradually grows attached to the calm, assertive Eldest Sister Stirling Celeste Stirling as they spend time together. During this period, Bryan demonstrates exceptional capabilities while keeping his true identity hidden. At the signing ceremony between the Stirling family and Horizon Group, Bryan's hidden identity is revealed publicly, shocking all attendees. He confesses his feelings to Celeste Stirling, resolves misunderstandings with the other sisters one by one, eases all existing rifts, and the two confirm their mutual affection, gaining a happy, fulfilling romance.