She used to be a cute younger sister, but after being influenced by Yankee comics, she became a ferocious younger sister who wields a nail bat. My otaku brother couldn't resist her sister and was always being fucked. One day, the figure that Otaku brother valued more than his life was destroyed with a nail bat, and he decided to take revenge. The revenge of the older brother who detained his napping sister and exploded his anger until now begins! My little sister is...
