“It’s obvious that only Little Sister loves Onii-chan.”

Nagami Suzuka is a beautiful third-year middle school student who has excellent grades and is the student council president. She wrote a novel about a little sister who dotes on her big brother, and the novel wins a light novel award. After they discuss the matter, Yuu, her big brother, is the one who debuts as a proxy light novel author instead of Suzuka under the pen name Towano Chikai (Eternal Promise).

Volume 1

Prologue
Chapter 1 – The Reason Why My Little Sister and I Became Light Novel Authors (Part 1)
Chapter 1 – The Reason Why My Little Sister and I Became Light Novel Authors (Part 2)