Ore ga Suki nano wa Imouto dakedo Imouto ja Nai

Yuu Nagami, an aspiring writer of light novels, often enters writing competitions, but she has yet to take home any prizes. Despite his repeated failures, he is unwavering in his commitment to improving as a writer. He finds that someone by the name of Chikai Towano won the most recent contest he entered when he looks at the list of winning authors. He quickly learns that his sister Suzuka—the last person he can see writing—is the author hiding behind the pen name. Suzuka asks her brother to stand in for her so she can avoid revealing to everyone that she is Chikai Towano. Yuu consents, but on the condition that he continue to pose as Chikai Towano for his sister up until the point at which he releases his own book. In the interim, Yuu makes the most of his new persona to hone his writing abilities, connect with other writers, and make new friends.