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APOP Entertainment is a music label under Mystic Entertainment, and is home to Ga In and Jo Hyung Woo and led by producer Cho Young Chul.

The agency rep stated on the 11th, "Thunder is an artist with endless potential in various fields... We will show our support for Thunder's growth not only in his music career but also in a variety of fields including acting and variety shows. For his acting career, Mystic Entertainment's acting label Family Actors will show their wholehearted support.

Thunder and producer Cho Young Chul have known each other since prior to his debut... Thunder was originally a trainee under LOEN Entertainment, and also previously participated in a featuring for 'Merry Christmas in Advance' from IU's 3rd mini album 'REAL', which was produced by Cho Young Chul under LOEN.

As someone who saw Thunder since before his debut, producer Cho Young Chul is very well aware of his potential and star quality... As much as Thunder has a lot of passion and determination to continue his career, we will show our support to help his talent shine. We ask for a lot of support and interest."

Mystic Entertainment consists of labels Mystic89, APOP Entertainment, and Family Actors.