An older brother who received an aphrodisiac from a senior decided to use his sister, who had developed only her breasts and become insolent, as a test subject for mischief. He dissolved the aphrodisiac in a drink and made her consume it. Perhaps he misjudged the dosage because it was more effective than expected, causing his sister to go into acute estrus! "My pussy is so hot and weird... I can't stand wanting my brother's dick!!" she rubbed her soaked pussy against him, desperately begging for sex! His sister, turned into a cock zombie, greedily sucked on her brother's cock, repeatedly convulsing in orgasm, turning her entire body into an erogenous zone addicted to cock...！！
