Brother Gets Perfect Scores, Sister Fulfills Every Dirty Fantasy 2:31:53 1080p

A failing student gets a powerful incentive from his older sister: if he earns perfect scores on his next exams, she will do anything he asks. Motivated by the promise, he locks himself in his room and studies relentlessly. When the results come in, he has achieved straight A's on every test. True to her word, his sister prepares to fulfill her end of the bargain—but she has no idea how far his desires will go. With their parents away for three days, the brother presents his sister with a revealing 'naughty bunny' costume. Though embarrassed, she puts it on. He then commands her to call him 'Master', to stroke and suck his cock, to let him titfuck her, and finally to fuck her. At first she complies out of obligation, but as shame gives way to arousal, she finds herself craving his touch. By the second day, she is the one initiating acts, willingly becoming his slutty bunny. The incestuous tension explodes into raw, passionate encounters that blur the line between duty and desire. When their parents return, brother and sister slip back into normal roles—but the dynamic has changed forever. She secretly reaffirms that anytime he gets perfect scores, she will obey any demand. This is an erotic story of sibling taboo, reward-based submission, and unleashed desire. Starring Ai Sayama in a rare JAV incest roleplay, this video combines shy reluctance with full-blown corruption.