Serena as the Thunder princess knight struggles by fighting against monsters to defend the Alexia Kingdom. As a compensation for her to be able to wield the demon sword, she gets cursed with a male genital in her crotch. One day, due to Marietta who appeared aiming for the demon sword, Serena got forced into futanari training. Furthermore, her comrade-in-arms and the leader of the kingdom's knight team Irene also grows a meat rod and is tormented by an ejaculation impulse. Controlling ejaculation timing, exposure cumming in front of a magic mirror, eliminating men's desires, wearing embarrassing costumes. Various shameful plays trample their pride. This is the story of the girls who fell into carnal desires
