At midnight on Sept. 12 KST, WEi (Jang Daehyeon, Kim Donghan, Yoo Yongha, Kim Yohan, Kang Seokhwa, and Kim Junseo) dropped their debut trailer video, heralding a birth of one impressive boy group. The released video shows WEi in two groups. Yohan, Daehyeon, and Junseo saw a meteor crossing the sky, and soon the light from the night sky come down as a butterfly to Donghan, Seokhwa, and Yongha. When the butterfly turned into a light again, WEi appeared as a whole group. Wearing overall white-toned outfits, WEi gave off an intense aura, raising the curiosity of viewers. Also, the word ŌĆ£First SightŌĆØ showed at the end caught the attention. Meanwhile, WEi is greeting their fans every week with their own reality content, ŌĆ£OUI GO UP.ŌĆØ
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