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Moon Seo‑yoon, eldest daughter of Shinsegae chairman Chung Yoo‑kyung, has officially entered the K‑pop world as a member of the co-ed group ALLDAY PROJECT, the agency The Black Label announced on June 9.

Moon will perform under the stage name “Annie.” The five-member lineup—featuring Annie, dancer‑choreographer Bailey Sok, former trainee Woochan, model Tarzzan, and Youngseo—is set to debut on June 23. Alongside her entry, the agency released teaser videos and member photos across social media, already garnering over 60,000 followers.

Annie is not only the eldest daughter of Shinsegae's chairman but also the granddaughter of the conglomerate's matriarch, Lee Myung‑hee. She is currently enrolled at Columbia University and has built a strong online presence with more than 70,000 Instagram followers. 

Industry insiders highlight that Annie’s debut marks the first time a direct descendant of a major business conglomerate—a “chaebol idol”—has officially debuted in K‑pop. Speculation about her debut began earlier when photos appeared of her training at THEBLACKLABEL’s practice studio, alongside trainees who later debuted in the girl group MEOVV. 

The Black Label, founded by Teddy (who rose to fame producing hits for BIGBANG and BLACKPINK), launched MEOVV last year. AlLLDAY PROJECT will be their second K‑pop act.