Similiar theme of much Older man and Younger woman romance that surpasses age and status. Difference is they got married and the series trace their journey past that initial spark of passion. Especially when the male lead hid the fact that he was a rich man.

The main female character in Fake Princess (FP) reminded me so much of the general's daughter in My Bratty Princess (MBP).
In MBP, the female lead was a feisty lifely young woman who loved to go around in male disguise and making friends with unsavory characters to rob the rich, but in her case, it was to give to the poor.
In FP, the female lead was also as feisty and lively though her motives were more selfish in nature but she also cared for those who were part of her 'family'.
Both series involved a series of incidents which required both leads to face. Though my fave would still be Alex Su!

Tried to recommend W but not finding the series and showing only the special.
Cross-world traveller between realtime and a manga world, there is some action and some mystery. Not costume but still worth a watch.

There is a fine line between online and realtime, and this movie simply explores this idea. It's more of a romantic comedy but with some good CGI fighting.

Same story premise. Different execution. More serious with more emphasis on court intrigue. Good fight scenes.

Gender Bending because her missing mother insisted that the female lead had to be a boy. Female lead is confident strong, witty and smart but she really wanted to be herself rather than 'himself'.

Historical setting.

Gender Bending because of family obligations and responsibilities. The female lead also knows martial arts and is chivalrous. She is strong willed and confident, with many friends.

Gender Bending because of family obligations and responsibilities.