Sara secretly worried about her thick pubic hair, finding relief by using her pussy for her brother Tsuki's tongue. However, Tsuki, now at a mature age, desired to insert himself into his sister's pussy, but Sara cleverly deflected his advances, reminding him of their familial bond. Determined to have sex, Tsuki secretly continued to slip aphrodisiacs he found online into Sara's food... One day, Sara's body became unusually sensitive, and she found herself craving her brother's cock. This aphrodisiac-induced, shocking reversal leads to a taboo incestuous story!