Azusa and Saori are best friends... They are very close and are enjoying school life... However, when it comes to sex, Saori is more active... She has sex with her boyfriend Eto-kun from the basketball club almost every day. It seems that Saori stimulated her, and Azusa, who was her secret agent, suddenly became sexually active. The person Azusa chose is not a handsome, popular guy, but a creepy, otaku-like Shimoda-kun who keeps saying na, na, naan. Azusa's sex lessons begin with Shimoda-kun. At first, Azusa continues to refuse sex, but finally she has sex with creepy otaku Shimoda-kun...and after that, Azusa transforms into an erotic boss! I wonder how long she can withstand Azusa's sex attacks.