Recently, my grades have not been good. Seeing me studying hard, my older sister encouraged me by promising to obey any of my requests if I achieved a perfect score on the next test. Motivated, I stayed at my desk, diligently studying for the upcoming test. And the result, I not only achieved a perfect score on this test but the entire exam this time. And as promised, my sister will obey my requests. On the three days our parents were away, I gave my sister the 'seductive bunny outfit' to wear, although she didn't want to, but because she promised, she had to accept it. Not stopping there, I asked her to call me master, masturbate, suck me off, let me suck her breasts, and even have sex with her! At first, she did it to keep her promise, but felt embarrassed wearing the revealing outfit, felt excited when calling her little brother master and even letting her own little brother have sex with her, the sensations seemed to awaken the desire inside her. She actively wanted me to have sex with her, wanted to be my 'seductive bunny'. After three days, our parents finally returned home, and we returned to normal. But my sister still promised that, as long as I achieve a perfect score, she will obey any of my requests.