Me, Luna Tsukino, who had anal orgasms with my girlfriend's little devil sister MIAA-509

Experience a female orgasm similar to a woman's orgasm through prostate stimulation. You'll experience pleasure that's unattainable with a penis. This is the second installment in the series, set up as an introductory piece to female orgasm works, with a lighthearted premise and a balance between comfort and discomfort. Seduced by a super-sexy younger sister, this is a setting found elsewhere... but from here on, it's all about [playing with a man's anus]. The thrill of having your anus secretly developed without your girlfriend noticing is incredibly exciting.