The FL and ML for both dramas belong to different groups and ultimately have to work together to achieve a common goal.

Both of the female leads travel back in time to the Qing Dynasty. There, the female leads capture the attention of the princes and get entangled with them.

Itazura Na Kiss is the original Japanese drama version of Fall in Love at First Kiss, adapted from a manga with the same title. It follows the lives of Naoki (Jiang Zhi Shu) and Kotoko (Yuan Xiang Qin).

Playful Kiss is the Korean drama version of Fall in Love at First Kiss.

It has the same characters, Jiang Zhi Shu and Yuan Xiang Qin with the same plot where a not-so-outstanding girl falls for the genius of the high school.

Both follows the lives of an aspiring actor/actress, who starts off as an extra. They continue to persist despite the set-backs that they meet.

Both are set in the office setting, and the leads also share a boss-employee relationship besides a romantic one.