Explore the intriguing world of Natsumi’s Secret Milk, a captivating web novel that delves into the taboo relationship between two siblings. Join the male protagonist as he navigates through the complexities of adult themes and ecchi moments, all centered around a unique storyline involving a controversial act. Discover the secrets and desires that bind these characters in a modern-day setting, where the lines between family and intimacy blur. With themes like breast fetish and incest, this novel promises a thrilling and thought-provoking read.