In the drama, IU plays the role of Sung Heejoo, the CEO of Castle Beauty. Born as the illegitimate child of the Castle Group, Sung Heejoo is a chaebol heiress who possesses a glamorous appearance, exceptional intelligence, a fierce competitive spirit, and management skills proven by winning the Top Entrepreneur Award. If there is one thing she lacks, it is her status as a commoner, which becomes a weakness in the (fictional) constitutional monarchy of South Korea, where the authority of the yangban (the elite class of the Joseon Dynasty) still holds immense power.

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Determined to overcome the limitations of being an illegitimate child and a commoner, Sung Heejoo sets a bold and secret plan: a contract marriage with Prince Lee Ahn (played by Byun Woo-seok), the beloved royal of Korea. A born strategist and winner who spares no means to achieve her goals, will Sung Heejoo be able to seize not only the corporate world but also the royal household as planned?

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In the newly released photos, Sung Heejoo’s professional, at-work moments as the CEO of Castle Beauty — who never misses the top spot in any field — immediately draw attention. Inside a conference room, as Sung Heejoo passionately leads a meeting with executives, the charisma of a company owner can be felt in her gaze.

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Another photo captures her at an event venue, where she stands in the spotlight under reporters’ cameras. As the CEO of Castle Beauty — someone whose every outfit and every meal becomes a hot topic — she marks her presence in everyone’s mind with her bold fashion. Attention is now focused on whether Sung Heejoo will also make her mark on the royal family.

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In released photos, CEO Sung Heejoo of Castle Beauty is shown in a professional element that captures attention — someone who never lets the top spot in any field slip away. In the conference room, leading a meeting with executives, Sung Heejoo’s gaze exudes the commanding charisma of a company owner.

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She was also photographed soaking up the spotlight from reporters at an event. True to the Castle Beauty CEO whose every outfit and bite becomes news, Seong Hee-ju leaves a memorable impression with bold fashion — and speculation is growing over whether she’ll soon stamp her presence on the royal scene as well.

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Fans are also eager to see IU’s passionate portrayal of Seong Hee-ju’s relentless drive to get what she wants. As an all-round entertainer who captivates audiences with both music and acting and is beloved by people of all ages, IU is set to reveal a fresh, never-before-seen side as she breaks taboos and carves out her character’s destiny.