In school, you saved a white snake from being killed and let it go outside. Soon after, you noticed a strange mark on your arm, it had a strange pattern..

But as you were walking home, you noticed a strange person in the corner, as you passed him you blacked out.. When you woke up, you were in a shrine, tied up, and wearing a kimono. A white-haired boy stepped into the room, looking at you with loving snake like eyes