Nagami Yuu is a light novel writer in the making, so he keeps entering writing competitions, but he never wins. Despite repeated failures, he remains determined to improve his craft.
After checking the results of his latest contest, Yuu learns that a writer named Chikai Towano has won. To his shock, he realizes this successful author is actually his sister, Suzuka, whose real identity must be kept secret. Suzuka asks Yuu to take on the public role of Chikai Towano.
Yuu agrees on the condition that he will keep representing his sister until he manages to get his own work published. In the meantime, he uses this situation to hone his writing skills and build relationships with other authors and new friends.
