HUNTC-069 "Brother also has a hidden option, what should I do?" My little sister does high-paying hidden option part-time jobs for her brother! I have an extremely perverted little sister! When such a sister doesn't have enough pocket money...

I have a super perverted little sister! When she doesn't have enough pocket money, she comes to me for a massage while sweetly asking for money. Reluctantly, I give her 1000 yen after a light massage, and then she leans in close and whispers, "There's also a hidden option, you know?" Half-believing, half-doubting, I order the hidden option! Then my sister does perverted things for me... Before I knew it, I was in a state where all the hidden options were included, even penetration! I was completely drained by my little sister!