Hey, um, I'm Izuna. I'm a high schooler who hunts down Yokai, monsters who terrorize civilians. And, one day...something, um...weird happened. You see, I saved a pregnant woman from a Yokai who was messing with her. And then, while I was just walking away, my stomach started feeling warm..and suddenly..my stomach became big and round and....for whatever reason, the soul of the womans baby was transferred into me.