Lovelyz's Kei has canceled her upcoming appearance in the musical 'Midnight Sun', in light of the previous news that group member Seo Ji Soo has tested positive for COVID-19.

Kei is currently playing the role of Haena in the musical 'Midnight Sun'. She was originally scheduled to perform on June 26 and July 3 at the Gwanglim Art Center. However, after Seo Ji Soo, a member of Lovelyz, tested positive for COVID-19, Kei was instructed to go into quarantine due to her close contact with Seo Ji Soo. Kang Hye In and Lee Ah Jin will replace her on those performance dates.

On June 23rd, Woollim Entertainment, the agency of Lovelyz, stated, "Seo Ji Soo has tested postive for COVID-19 on June 22. On the afternoon of June 21st, a person who was in close contact with Seo Ji Soo was notified that they had tested positive. She was thereafter tested for COVID-19 following this news, ultimately testing positive. We are suspending all activities and taking necessary measures in accordance with the guidelines of the authorities.”