On March 14, Woolim Entertainment confirms, “INFINITE‘s Woohyun is casted in 'Mongdang Branch School Olympic' . It's true that INFINITE Nam Woohyun is casted in 'Mongdang Branch School Olympic' and they added that "Nam Woohyun is casted as "Hyunwoo" the teacher. He is challenging the screen for the first time through this movie.
It was previously reported by another media outlet that his appearance was confirmed.
“Mongdang Branch School Olympics” is a movie based on a webtoon of the same name. It is a heartwarming story about that takes place at a branch school in the mountains of Gangwon Province. Filming began on March 10 at Goseong, Gangwon.
Source :  Naver +  Soompi
Trans by Hyon for infiniteupdates.net