Just Another Pandora's Box (movie, 2010)

Qing Ye Se only knows how to be a thief, but he runs into major trouble when he accidentally steals the heart of Rose, an immortal fairy. During a chaotic chase, Qing gets ahold of the Pandora's Box, sending them both back in time to the Three Kingdoms era. Mistaken as a general, Qing is thrown right into the middle of the Battle of Red Cliff. Meanwhile, Rose continues to devise new ways to earn Qing's affection, even if it means having to be someone else.