Secret Maiden Revolver

Secret Maiden Revolver summary: Hinata, a high school student yearns to be seen as a tough guy; a dream that is constantly challenged by his classmates who mercilessly bully him due to his uncanny resemblance to a girl. Despite this, Hinata's luck takes a dramatic turn when he gains the ability to transform into a gunner princess fighter. With his new powers, he plans to put an end to the harassment and finally achieve the manly persona he so desires. Bonus story: Kurage's Love.