Its one of the best hanime i ever watched those glossy trex animation is on the next level and the female character design is on another caliber Its story is also better than some of the other hanimes which have way illogical plot its one of my favoirite one. How his sister caught him masturbating and how huge his penis was, she shared the pic to her friends and how they got into intercourse with her brother by getting turned on by his so called 'cockzilla' and how in the next episodes his sister also gets adicted to his penis and joined her two friends,the bathroom scene of the brother and sister where the perfect example of animation quality the scene where he creampies his sister in the bathroom 3 times and in the 2nd episode how his sister and her 2 friends indulge in a pleasure battle with the boy and all of them gets creampied. I highley recomend every hanime lover to watch this masterpiece by the trex studio