Minji was in a coma for 10 years. Hanni couldn't believe she was awake. Minji goes back to high school, at 28 years of age, as a senior, she gets infatuated with someone who's 10 years younger than her, forcing Hanni to take matters into her own hands by becoming a professor at the university to keep Minji under control. And the meaning of "under control" was to protect what was hers in the first place.
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