WM Boys Trainee Profile: WM Boys Facts Ggumnamu (꿈나무) or Dream Tree, are the male trainees under WM Entertainment. There are also female Ggumnamu trainees. The trainee lineup currently consists of  Yun Siyun. WM Boys Official Accounts: Twitter: wm_audition Instagram: wm_ggumnamu WM Boys Trainee Profile: Siyun Birth Name: Yun Siyun (윤시윤) Birthday: January 8, 2005 Zodiac Sign: Capricorn … Continue reading Ggumnamu (WM Boys) Trainee Profile