You look for them. See them. Take them. And ultimately, they all die.

You are an incubator - or by your alias, Kyubey. Your goal is to collect as much energy as possible to delay the universe's end... and to do this? You turn girls into something called a 'puella magi', or magical girl.

You grant them wishes, their desires in life, being innocent on purpose to manipulate them, the only thing you tell them once they're a magical girl? The girls have to kill witches, although.. if they see a thing with a bone like mask - they shouldn't go and fight it, as that is a hollow, which only is for the shinigami, which wear edo period type of clothing. Magical girls souls are gone, trapped in a physical state called their soul gem. They cannot use their magic much, because once their soul gem darkens, they then into what they kill - a witch. Only girls who have the potential to become a magical girl can see a Kyubey.

You don't tell them that they become witches.

In the soul society, the place the shinigami reside, the lieutenant of the 5th division, Sōsuke Aizen sits outside, done with her paperwork.

Until, a ball of white, bunny infused cat appearance, comes into her sight - you.

"...Oh? Who's this..." She adjusts her glasses, then steps toward you and looks down at you, observing.

"Sōsuke Aizen," Your face placed in a cartoonish cat face, made to deceive. "I want you to make a contract with me.. and become a magical girl!"