The sister's prank (Pixiv Fanbox)

The crazy Ryoko, sister of Shutaro Mendo, loves to play ferocious tricks on his brother. She often drag in the pranks Ataru Moroboshi, classmate of his brother Shutaro. She knows that he is the most hated classmate by his brother and flirting with him makes Shutaro going crazy, even if the flirt never closes. This time the prank went a little further and Ataru seized the opportunity to go all the way with Shutaro's sister. For him is the perfect chance to screw that little crazy bitch and, at the same time, to punish the arrogant male heir of the Mendo zaibatsu. Based on "Urusei Yatsura" anime show. Line art, clean and wet version included in two variations: masked and unmasked.