The title , titled "My Brother-in-law's Insatiable Cock Is A Perfect Hit! My Defenseless T-back Sister-in-law Is Fucked Hard In A Machine Gun Back Piston," is a Japanese adult video (JAV) released on January 31, 2025. Produced by the studio Wanz Factory and starring actress Ai Sayama , the film follows a common "cheating wife" and "cuckold" narrative. Overview of WAAA-476