【Arsenal】Debile Cheryl Tits

One day, the princess of the demon world, Krull, suddenly appeared in front of Kazuki. Her race had to make a “contract" with humans in order to train for adulthood and extract semen from them. The two of them spend all their time training, and Kururu’s younger sister Leah and Kazuki’s older sister Sakurahana join them in their harem life, but eventually things change… Kururu Contract! A complete edition of all eight episodes, plus new episodes and a short story.