Matías Soto Perez, a very normal human teenager from Earth, suddenly finds himself living a double life, but not the cool kind where he's a superhero or something; instead, he's just one of several "monsters" magically summoned every night to another world by a power-hungry alien to help in conquering neighboring villages... and in more mysterious pursuits. Awake in one world whenever he's asleep in the other, Matías is first catastrophically distracted and then approaching the verge of mental exhaustion. He and the rest of the monsters must find a way to stop the summoning before it makes an even bigger mess of their lives!