A middle school girl writes a light novel about loving her older brother, wins an award, then watches him publish it under his name instead. The show is honest about what it's really asking: how much of yourself do you pour into a story about wanting someone, and what happens when that story becomes public and he's reading it. The romance between them never quite settles into comfort, because every scene carries the weight of a confession she can't fully take back.
Yū's life takes a chaotic turn when his younger sister Suzuka, a brilliant student council president, wins a prestigious light novel award for her debut work. There's just one problem: the story is about an adoring little sister and her older brother, and Suzuka refuses to publish under her own name. Instead, she convinces Yū to become the public face of her creation, debuting as the author "Chikai Towano" while she ghostwrites from the shadows. What follows is a comedy of errors as Yū navigates the cutthroat world of light novel publishing, complete with demanding editors, obsessive fans, and increasingly awkward public appearances. All while Suzuka watches from behind the scenes, manipulating every interview and event to suit her vision. The irony is thick: the book that started this whole mess is about sibling affection, yet the real relationship between author and proxy is anything but straightforward. This is a romance-tinged comedy about ambition, deception, and the strange dynamics that emerge when family secrets become bestsellers. It thrives on the absurdity of the situation and the chemistry between its two leads navigating impossible circumstances.