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A group of high schoolers came to Yeon Ju to tell her that Mi Na, the school's top student went missing. Yeon Ju soon finds out Mi Na has been taking unknown drugs to relieve her stress. Yeon Ju goes back to the office to figure out what the drugs are, and it turns out the drugs are for ADHD. Yeon Ju and Leo go to Mi Na's house to find her but instead, they find Mi Na's mother who seems to be intoxicated.