The Hills Have Size ( Hitozuma Kasumi-san ) Volume 1 - Erroneous Night

Ryoji has always been like a brother to his cousin, but all that changes when Ryoji witnesses his cousin's wife pleasuring herself one night. Then the next day, Ryoji walks in on Kasumi in the shower. Unable to get the image of Kasumi's massive breasts & her masturbation out of his mind, Ryoji makes it his mission to satisfy the unfulfilled woman. However, Kasumi's sister, Harumi, and Kasumi’s own daughter, Mio, have their own plans for Ryoji . . . .

In sexually explicit THE HILLS HAVE SIZE, the word "family" takes on new meaning, as Yoji makes a move on his cousin's wife after he is enticed by the chance occurrence of seeing her pleasuring herself. Drawn to this image, Yoji throws brotherly bonds by the wayside, pursuing Kasumi, her sister, and his own niece all at the same time.

Quite possibly one of the most amusing made up titles for an adult series, the Hills Have Size is actually quite a lot of fun.

The Hills Have Size ( Hitozuma Kasumi-san ) Volume 1 - Erroneous Night