I was wondering if anyone knows a manga (or manhwa) where the main character has a talent that they hide from everyone or an ability of some sort.

An example (although not a very good one) is Area no Kishi

Thanks!

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Gokusen - hides her fighting skills from her students.

Yakushoku Distpiari - Gesellshaft Blue. The synopsis explains it a bit.

Seiyuu Ka! - MC wants to voice a magical girl type series, but discovers she actually can do a really good male voice. She then leads a double life as a guy so she can voice act while still going to school as a girl.

Watashi ni xx Shinasai! - MC is secretly a cell phone novelist and blackmails a guy into helping her figure out how to write a more convincing romance

Nurarihyon no Mago may fit the bill, the MC has to hide from his classmates that he is a half-youkai who is human by day but turns into a youkai at night.

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