My lovely little sister was taken away by someone... Namiki Yu ADZ-276

Yu Namiki is about to challenge the ultimate combination of incest and NTR! A younger sister who, behind her parents' backs living overseas, has a forbidden relationship with her adopted brother. However, one day she is coerced and unable to discuss the matter with her trusted brother, forced to obediently accept his threats and be brutally humiliated in front of her beloved brother…!