TYSF-019 English Subbed: I gave my little sister’s friend an aphrodisiac while they were playing at home

When I secretly gave my little sister’s friend, Mai-chan, an aphrodisiac, her nipples became incredibly sensitive! From that day on, I remembered to stimulate her nipples every day, even though I didn’t like it. And finally, I became a sex prisoner, ejaculating inside her vagina while my nipples were still sensitive.