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Jeongmin is a loner in high school being bullied by the Queen Bee, Juhyeon. The two were friends in elementary school before their friendship ended because of Juhyeon's demand that Jeongmin should only be friends with her. Juhyeon uses this "betrayal
Seohwa finally gets hired at the best mattress company in the country, but its CEO, Cheolsu Gam, turns out to be a sleep demon who hasn't been able to sleep for 600 years! Upon meeting, he suspects that she's his human partner - the only person who c