SSIS-699 Every day I give aphrodisiac to my big-breasted stepmother who is four years older than me... On the seventh day, she became a horny mother pig who always wants incestuous and intense sex anytime, anywhere. Sakai Otada.

The story follows a young boy who secretly administers aphrodisiacs to his busty stepmother, who is four years his senior. From initial resistance, by the seventh day, she completely succumbs, transforming into a lustful sow craving intense incestuous sex with her stepson anytime, anywhere. The plot depicts her transformation from a virtuous wife and mother to a sex-crazed vixen under the drug's persistent effects, brimming with taboo mother-son incest elements and high-intensity sex scenes.