Male lead hides his skills from everyone

The male lead is smart or is good at something but he hides it.

many thanks for considering my request.

 emeraldarrows:

• Healer (ML has a secret identity and is a good fighter, but pretends to be weak and cowardly)
• Rookie Historian Goo Hae Ryung (ML is a popular and talented romance writer but no one knows this since he writes under a pen name and hides it)
• Wrong Carriage, Right Groom (ML is skilled at martial arts but pretends to be weak and sick)
• Love Like White Jade (ML pretends to be a playboy but is sort of a superhero with a secret identity)
• The Only Girl You Haven't Seen (smart, scheming ML who pretends to be "silly")

I saw them all. but thanks for recommending exactly what I am looking for.