Kim Nahee as Jeon Hwayoung/Violet
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Cha Eunwoo as Lee Suho/Leo
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Moon Gayoung as Lim Jugyeong
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Hwang Inyeop as Han Seojun
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Park Yoona as Kang Sujin
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Kang Minah as Choi Sua
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Lee Iljun as Yoon Taehoon
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Kang Chanhee as Jung Seyeon