Sao Tsumugi gains the power of the ancient legendary artifact "Master Force," transforming her into Haruno Manami, a heroic cosplaying futanari warrior dedicated to upholding justice. She constantly battles evil conspiracies to protect the world. Dr. Okama, deeply devoted to her, one day invites her to his home and secretly administers sleeping drugs to render her unconscious. Taking advantage of her helpless state, he proceeds with a bold experiment—using her body to test his research on chromosomal abnormalities. The modified Haruno Manami undergoes a transformation, experiencing the pleasures of both sexes as she evolves into a new form. However, this experiment leads to a tragic outcome… [BAD END]