The runaway angel princess and the four guardians of heaven, who are in search of her in the human world, are on a field trip. A field trip sounds like so much fun! But the princess, who is still disguised as a school boy, is plagued with more troubles as always. Will the guardians be able to save her from all the trouble?
Also, the secret past of the beautiful Ah-Hin and powerful Woo-Hyun is about to be revealed. What will be waiting for them after the trip?
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