Shuuen no Majo to Sekai no Tabi

After a long battle between the demon king's army and humanity, Elena Mercurio, a witch who is feared for her cruelty, finally managed to corner humanity, but she got resistance from humanity which made her lose her magic power!"Damn humans!, watch out, I'll get back at you later!", After getting her magic power back, she who was supposed to end humanity chose to cancel her intention after meeting Taro, a simple and kind boy.And after that meeting, the two of them finally went on a journey together.