Koichi quit his job and became a novelist. However, he could not think of any topic and was unable to write a novel.One day, in order to concentrate on his novel, he decides to move to the countryside to live in the atelier owned by his grandfather. Koichi is stunned by the empty countryside, but there he meets Ichika, a black high school girl who is out of place in the countryside. She's sexually uninhibited and seems like she'll let you have sex right away, but she also has a strong desire to get married, and she's good at cooking and managing people. Koichi is attracted to Ichika, and before he knows it, he wants to make her the heroine of his own novel. For some reason, he was supposed to live with Ichika!!!? This is how the cohabitation life with a black gal begins. When Ichika invites her to have sex with him in order to have a child, will Koichi be able to suppress her rationality and successfully complete her novel? This is a slightly naughty marriage story in which a sexually uninhibited girlfriend and a novelist marry and have a child.