Nekota and Hoshino were constantly arguing at school, but in truth, Nekota actually harbored a crush on Hoshino. One day, he finally gathered the courage to confess his true feelings to her, but she rejected him with mixed emotions. Feeling dejected, Nekota returned home only to discover that his father was remarrying. The complication was that Nekota had to live alone with the new wife's daughter while the two parents traveled to Europe. However, the woman's daughter turned out to be Hoshino...