someone acts silly/dumb but in reality is calculating and smart

Recommend me drama where Character acts goofy but in reality is calculating and smart just putting on a silly demeanor as a mask.

Some examples that I watched and loved & definitelly recommend to others:

city hunter

healer

lookout

Bridal Mask

many thanks for considering my request.

Maiden Holmes

The Story of Ming Lan (2018) - the FL pretends to be dreamy and a bit clumsy, but in reality she is rational and calculating

Royal Rumours (2023) - the FL acts naive and weak, but she is smart and can do martial arts