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Goong, Volume 5 - Manga Bookshelf
Goong is set in an alternate version of modern Korea in which the monarchy survived and continues on as in England or Japan. Chae-Kyung is an ordinary girl who happens to attend the same high school as the country's current crown prince, Shin Lee. Though the prince is much admired and fairly dreamy, Chae-Kyung discovers early on that he is also a real jerk.