Girl group Billlie's member Moon Sua, who recently lost her older brother, will not be participating in the group's Japanese debut promotions.

On May 11, Mystic Story announced through Billlie's official fan café that Moon Sua would not be participating in the Japanese album promotions scheduled to begin on May 17 with the release of their debut album in Japan.

Mystic Story stated, "The promotional schedule will proceed with the remaining six members, Haram, Haruna, Sheon, Siyoon, Suhyun, and Tsuki," and asked for "deep understanding from the fans."

Last month, on April 19, Moon Sua tearfully bid farewell to her older brother, Astro member Moonbin. Due to the sudden news of Moonbin's passing, Moon Sua canceled all scheduled events and received visitors as the chief mourner at the funeral. Billy members also joined in mourning for Moonbin and temporarily halted their activities.

Since then, Billy has resumed activities as a six-member group. Moon Sua did not participate in scheduled events such as MBC M music program 'Show Champion,' where she serves as an MC, and fan signing events.

Below is the full statement from Mystic Story on Billlie's fan café:

Hello. This is Mystic Story.

We are here to inform you that Moon Sua will not be participating in the Japanese album promotions scheduled to begin on May 17th with the release of their debut album in Japan.

The promotional schedule will proceed with the remaining six members, Haram, Haruna, Seon, Siyoon, Suhyun, and Tsuki.

We kindly ask for your deep understanding.

Thank you.