The sister I like but not my sister

Yu Nagami (voiced by Yu Hatanaka) is a freshman in high school. He loves literature and aspires to become a light novel writer. He often submits articles to participate in some light novel writing competitions, but is always passed in the first round. Nagami has a sister named Lianghua (voiced by Kondo Rena). Lianghua has beautiful appearance and excellent grades. She serves as the president of the student union in the school and is the coveted object of her classmates. At home, Lianghua naturally doesn't have a good attitude toward her good-for-nothing brother and always treats him coldly. By chance, Yongjian learned a piece of news that shocked him. The novel written by his sister Lianghua actually won the prize in the light novel competition. The content of the novel described a pair of brothers and sisters who loved each other very much, which was very different from reality. It turns out that in Lianghua's heart, she actually longs to be close to her brother.