My Little Brother Is Seriously Huge, Want to See?

Based on the acclaimed CG collection by Chinjao Girl, this adult OVA follows a young man whose impressive endowment unexpectedly becomes the center of attention. What begins as a casual joke among his older sister and two of her friends quickly spirals out of control when they insist on seeing it for themselves. Their playful teasing leads to an intimate encounter that marks his first sexual experience, forever changing the dynamic between them. From that moment onward, the three women become completely captivated by his remarkable size. Rather than treating the incident as a one-time mistake, they begin visiting his house regularly, transforming their casual curiosity into a recurring and passionate arrangement. The story explores the escalating encounters as boundaries continue to blur within the household. The original work saw an early digital release followed by a physical edition in the spring of 2021, with a demo previously made available to players of the RPG browser game Aku no Onna Kanbu: Perigee New Moon. Its enduring popularity has also led to multiple live-action adaptations over the years.