A game in which magical girls are subjected to dangerous experiments in a laboratory run by an evil organization. In a world where evil organizations repeatedly invade, some girls with a strong sense of justice transform into beings with superhuman abilities called "magic girls" through a contract from another dimension called a "magic contract" and fight against the evil organization. SpoilerThe evil organization has trouble with the incredible abilities of the magical girls, but they are also trying to overcome them with powerful scientific powers. The magical girl captured by the evil organization this time is "Tsukigiri Mana". When a magical girl dies or becomes a wreck, her magical contract is automatically transferred to another person, so it is necessary to neutralize her in a stable state. In the midst of all this, a researcher from the evil organization proposes an experiment. It was to interfere with the magical girl's body and mind and turn her into a convenient being. Will Mana be able to endure the harsh experiments? Or will her mind and body be rewritten by the evil organization?