Nekokaburi Encore!

"Nekokaburi Encore!" is the story of Hirose Otoko, a girl who wears a cat costume outside and plays the role of a good "heroine". Her brother, who knows her rough nature, can't bear to see his sister forcing herself and begs her to stop because it's disgusting, but Otoko doesn't listen. Her senior, Matsuki Makina, notices Otoko's true nature and scouts her to join the drama club, asking her to use her acting skills in something other than wearing a cat costume. Believing her senior's advice that even if her rough nature is revealed, she can get away with it by saying it's "preparing for a role in a play", Otoko decides to go on stage.

(Source: Natalie, translated)