In a small doujin circle of three people, the main character lives an uncomfortable life, sandwiched between a reserved otaku named Yuto and a plain-looking but charming cosplayer named Airi, who are both conscious of each other.

One day, he witnesses Airi, with her bright red face, spying on an extreme erotic doujinshi that the main character had hidden away. In a fit of desperation, the protagonist asks Airi, "Why don't you experience the same thing?'' He pushes Airi down! Intense caress, creampie sex! He succeeded in making Airi fall instantly with one shot and making her swear allegiance to him as his convenient cosplay masturbator!

This is how the dream otaku life begins, using the erotic female body of Airi to do perverted cosplay play!