I want to read an overpower girl!, but she always hide her abilities(can be any ability but prefer combat or magic).

Any manga with this kind of character?

Thanks.

Superior -she hides her powers because she is the demon king, the one they are trying to kill. this one has a sequel too

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Like educational manga? take a look at Ed U. Manga's list of manga here

Oresama Teacher probably.

Witchcraft Works has an overpowered female character that used to hide her abilities, but once cat is out of the bag (in the first chapter...), she stops doing so.

Thank for your response but i have already read all of them.

Yankee-kun to Megane-chan

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I give up. I see not point in living if I can't be beautiful.

Thanks, I will try that

Durarara!! (Novel), perhaps. The anime is also good.

Ageha o Ou Monotachi - master of disguise, considered the best actress in the galaxy I think.

Warau Kanoko-sama - smart, good intuition.

Hoshi no Samidare - super strength.

Glass Mask - she doesn't try to hide her abilities, but she's so plain that no one thinks she would have them.