"Adult Trainee" tells the tale of hormonal teenagers as their bodies mature. There is Jae Min, who gets addicted to masturbation, conservative Yu Ra who begins a risqué rendezvous with her male friend and overweight Na Eun who’s never had a boyfriend before. The drama aims to express the raw and truthful worries and love stories of 18 year olds in a way that Gen Z can relate to. (Source: Koreaboo.com)