It was revealed on the MBC broadcast of the '2025 Chuseok Special Idol Star Championships (ISAC)' on the 6th that Tsuki from Billlie won the squat competition against former Olympic gold medalist Yoon Sung-bin. On that day's broadcast, the women's ssireum preliminary matches took place. In the match between Billlie and tripleS, both teams engaged in intense mind games from the start. Billlie emphasized their strength, while tripleS highlighted their height advantage.

Jun Hyun-moo commented, "Tsuki from Billlie is truly an ace. I know this because she has practiced a lot." Commentator Lee Tae-hyun said, "Behind her laughter during practice, you could see her competitive spirit." Jun Hyun-moo mentioned that Tsuki had previously won a squat competition against Yoon Sung-bin, which surprised Lee Tae-hyun. Yoon Sung-bin is a former skeleton athlete and Olympic gold medalist.

As the match officially began, Tsuki quickly scored 1 point by pushing Nien with her strength. Jun Hyun-moo emphasized, "Among the girl group members I know, Tsuki has the strongest competitive spirit." Next, Suhyun from Billlie faced off against Lin from tripleS, with Suhyun achieving a decisive victory using the "batdari" technique.

On October 5th, Tsuki posted several photos on her Instagram to share an update on her recent activities. In the revealed photos, Tsuki is seen enjoying a relaxing time at a resort overlooking the beach. Wearing a cream-colored slip dress and a see-through cardigan, she exuded an elegant atmosphere under the sunlight. Fans responded with comments such as "Getting prettier by the day," "Like a fairy," and "This is natural light beauty."

Recently, Tsuki appeared in the final episode of season 4 of the YouTube web variety show 'WORKDOL,' where she challenged herself with a flight attendant experience, marking the finale of the season as one of the three main MCs. Her witty remarks and sincere attitude received praise from viewers.

The MBC '2025 Chuseok Special Idol Star Championships' features a competition to determine the strongest female ssireum wrestler. The first part of the '2025 Idol Star Athletics Championships,' airing at 5:10 PM on the 6th, marks the return of the women's ssireum competition after five years. The event is hosted by Jun Hyun-moo, Lee Chang-sub, Lee Eun-ji, and Jonathan, with former champion Lee Tae-hyun joining as a commentator to add expertise and entertainment.

A total of 8 teams and 24 idol athletes are participating in the women's ssireum competition, promising fierce battles toward the finals. The powerful lineups representing each team include Jiu, Stella, and Yeon from Hearts2Hearts; Yewon, Hana, and Athena from FIFTY FIFTY; Moon Sua, Suhyun, and Tsuki from Billlie; and Jiu, Nien, and Lin from tripleS.

In particular, Moon Sua from Billlie attracted attention as she is known to come from a family of ssireum wrestlers. Commentator Lee Tae-hyun said, "You can expect amazing strength and surprising charm coming from her small frame." In fact, during the women's ssireum matches at ISAC, the idol stars' expressions changed dramatically, and the atmosphere shifted quickly. Scenes showed them applying techniques learned through training in real matches, and once they grabbed the satba (belt), the real psychological and strategic battles began.

One team even joked about asking their agency's CEO to buy them a car if they won the gold medal, turning the venue into a sea of laughter. Which team it was can be found out by watching the broadcast. The women's ssireum team competition will air on the 6th at 5:10 PM during the first part of the '2025 Chuseok Special Idol Star Championships.'