Loner Won-woo is a girl who suffers from Narcolepsy. Although Jun-seo always makes fun of her, Won-woo is about to fall for him. Won-woo’s mother Yeon-hee feels compassionate for her daughter who falls asleep whenever, wherever, without even realizing, and Sun-jae who secretly is in love with Yeon-hee touches Yeon-hee’s heart.
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