This is Rin Hoshizaki's second appearance after the previous work, and this time she is taking on an undercover project! Rin, who loves cunnilingus, will infiltrate a suspicious secret circle called "Cunnilingus Lovers Club" that she found on social media! With a mixture of excitement and anxiety, she musters up her courage and charges into the den of perverts! There, five cunnilingus maniacs await her, attacking her smooth pussy! What will Rin's fate be?