Not Sebastian is a captivating web novel in Japanese that tells the tale of a steward named Sebas-chan, who is not actually Sebas-chan. This intriguing story delves into the mystery of why he adopted the name Sebas-chan, offering readers a unique and engaging narrative. With its focus on slice of life themes, the novel explores the life of an old butler amidst a backdrop of charming interactions and subtle complexities, making it a must-read for fans of the genre.