Myung Soo is 12 Years Old Special - Lets Go To School Details Casts Title Myung Soo is 12 Years Old Special - Lets Go To School Genres Reality Comedy Release Date 2013-04-20 Episode Runtime 01 Hours 30 Minutes Season Number 3 Episode Number 326 Production Companies MBC Yoo Jae-suk Self Park Myung-soo Self Jeong Jun-ha Self Haha Self Yang Se-hyung Self Jeong Hyeong-don Self Noh Hong-chul Self Gil Self Jun Jin Self Jo Se-ho Self Hwang Kwang-hee Self