Dali and Cocky Prince

Do You Know How To Tell Dogs Apart From Wolves At Dusk? (1x10)

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Tae Jin explains to Da Li that Moo Hak approached her and Cheongsong Gallery with impure intentions to change her perception of him. Moo Hak becomes angry at Da Li for not believing in him and standing behind Tae Jin. However, it leads to him making a possible mistake.