I grew up as a man. My childhood friends who know that secret are gang-raped inside me... Abeno Miku Mari Rika

Miku has lived as me, but her school life is in trouble when a childhood friend who knows she is a woman transfers to school!? Rika plots to turn Miku back to being a woman, and Miku resists this, but her body reacts honestly. And when it's revealed that Miku is a woman, the male friends forcefully enter Miku and pour in thick semen...