My arrogant big-breasted sister made fun of me, so I forced her to wear lewd cosplay! One day, while feeling restless around my exposed valley, she said, "If you get a perfect score on the next test, I'll do anything you want (laugh) but it's impossible!" Her condescending attitude ignited both anger and lust within me. After pulling off a miraculous study session, I got a perfect score and demanded that she fulfill my request by wearing a lewd costume. She was left confused and helpless as I transformed her into my obedient pet, teasing her G-cup breasts until they were covered in shame and pleasure. Finally, I made her cum uncontrollably.
