Sickly Younger Brother, also known as '병약한 남동생' in Korean, is a captivating web novel that falls under the smut genre. This intriguing story delves into themes of brainwashing, featuring a cunning protagonist and manipulative characters. The narrative unfolds in a dark setting, exploring complex relationships and the challenges faced by the characters. With its unique storyline and well-developed characters, Sickly Younger Brother offers readers a thrilling and immersive reading experience.