“After-school crush” trainee Kim Yoon-seo reveals the past when he joined the Debut Team of SM, YG, and FNC but did not make his debut. Life as a trainee from the 4th grade of elementary school. In the MBC "Tokimeki after school" prequel edition "Hesitation before going to school" broadcast on October 31st. Eighty-three trainees and psychiatrist Oh Eun-young appeared. .. ..