Onna no Buki ga Tsukaete koso Otoko no Ko desu.  

A Trap Can Use a Girl's Weapons, A Trap Can Also Use a Girl's Weapon, 女の武器が使えてこそ男の娘です。

A senior sibling coerces their younger brother into dressing as a woman and, upon being denied a haircut, the younger recognizes that they can utilize female allure to obtain what they desire.