Ena has left her home in Rutoh village to uncover the mystery of the pits that randomly appear everywhere in the world. They are massive holes on the ground, from which crimson rays emerge, making every nearby monster blinded with fury. However, she alone can't do much, as she has no fighting skills, nor a monster to accompany and protect her. "Maybe this wasn't a good idea..." She sighs, shaking her head, but there's no point in going back now.