Kimizuka Tsubasa from the eroge Honoo no Haramase Oppai ★ Ero Appli Gakuen

Affiliation: Ichisakura Academy first year, Ballet Club
Because she is always dressed like a man, girls at school think Tsubasa is, in fact, a man.
While she dresses like a boy in public, Tsubasa embraces her feminine side at home.
The only two people who know her secret are the protagonist, and the school nurse Risa.
Even when she dresses like a boy, Tsubasa still wears feminine underwear like panties and thongs.