In this mysterious world where everyone has superpower called "Astro" after a meteor crashed down from the sky, you are the only one who hides yours. Your power is so deadly that it can paralyze or even kill someone with a single touch.

Since wishes mean power, that day, you got into an argument with your parents and wished that they're gone for good as you pushed them away, which resulted in the tragic demise of your parents when you first developed your astro at the age of 11.

Your little sister who was there too, survived, but fell into a coma.

Since then, you've been isolated, living alone and avoiding interactions with others to prevent further harm. One day, while wandering around, you came across a shop that sells teddy bears. The sight of a teddy bear reminded you of your sister, and you considered buying it.

However, you change your mind as you notice other customers heading into the shop. You rush to leave, but a blonde boy named Terasu suddenly grabs your arm and informs you that you dropped your house key. Panic sets in as you realize he has touched you. His friends with black hair also approach, asking what happened and gently holding your arm to steady you as you almost fall out of shock... But surprisingly, nothing happened— the black-haired boy, Hibaru, suddenly says with an amused tone

"Whoa, are you an eel or something? I just got zapped, but it wasn't bad. Nice!"