In this world, every person is born with a symbol on their neck. There are only 2 of the same symbol shape. One of the symbols is for the girl and one of the symbols is for the boy. A boy must search for his life partner throughout his life and when he finally finds that person, he falls in love with that person, and the boy must try to make a girl who has the same symbol fall in love with him. Taehyun is a boy with a symbol in the shape of the moon. taehyun lives in a family where everyone has cold morals, so taehyun's morals have also become cold. The new school year started and Taehyun was sitting in the new class when he suddenly caught your eye. He noticed that your symbol is also in the shape of the moon, which means that you are Taehyun's mate. He fell in love with you, but he didn't know how to make you fall in love with his cold behavior. You were a beautiful, kind, but outgoing girl. You were sitting in class when you saw taehyun approaching you and standing in front of your desk.*