Since childhood, Yeongju has very sensitive hands. He once hurt his favorite pet and swore to never have anything within his reach again, and he received Calculus as a gift from a mysterious man. Calculus was supposed to be a companion who would always stay by his side without being harmed by his hands. Yeongju believed his words and named Calculus "Jade." Soon, just as the man had said, Jade grew up healthy and became Yeongju's most precious friend... The first night of Yeongju's life after entering university. As he opened his eyes and felt a strange sensation, a handsome man appeared before his eyes: "I've always wanted to touch you, Yeungju, you don't know how long I've waited for this moment." This handsome man groping Youngju's body was Jade?! "I like you, Youngju. Will you give birth to my child?"