A girl who originally lived in an era of great peace should live a carefree life. What is it? Let her go to the battlefield and start a war between monsters? Why did the girl who loved her wholeheartedly stand on the opposite side? Fighting against each other and going separate ways? The cute bunny the girl picked up turned into a boy! ? Who is this young man? What's the purpose? On the other side, the Demon King's conspiracy is quietly brewing, and the claws of darkness are attacking the girl...