Download MP3 NCT 127(엔시티 127) - INTRO + Fact Check (불가사의; 不可思議) + On The Beat + 삐그덕 (Walk) Download MP4 NCT 127(엔시티 127) - INTRO + Fact Check (불가사의; 不可思議) + On The Beat + 삐그덕 (Walk)