Unable to view and get porn from the internet using a PC their father won at a raffle, Ako and Riko decides to buy erotic games in Akihabara. But in the process Keita has to accompany them, so they devise a way to hide their real purpose for going to Akihabara. Ako distracts Keita by taking him to a cosplay shop whilst Riko investigates the 18+ section of a game shop. Whilst changing, they run into Ako's teacher, Yūzuki, who is a closet otaku (dressed as Mahoro from Mahoromatic Maiden). Riko later encounters her whilst trying to get a special edition game. After meeting Keita and being reminded about Ako and Riko's crush on him, Yūzuki drags him off to talk to him, inadvertently taking him to a cosplay-themed love hotel. After later being found by Ako and Riko, the group are encountered by Keita's kōhai and Yūzuki's younger sister Mikazuki, who covers for Yūzuki by stating she was buying the game for her. Mikazuki is an otaku as well—she gets Yūzuki to cosplay as Mai Shiranui for her that night.
No es posible ver la pornografía de la Internet utilizando el PC a su padre ganó en un sorteo, Ako y Riko decide comprar juegos eróticos en Akihabara . Pero Keita termina acompañando a ellos, así que idear una forma de ocultar su verdadero propósito de ir a Akihabara.
아버지가 회사 빙고 대회에서 당첨되어 컴퓨터를 받아오셨다. 야한 것에 관심이 많은 아코와 리코는 컴퓨터로 야한 정보를 검색하려 하지만 미성년자 보호를 위한 필터링으로 실패하고 만다. 그리하여 생각해 낸 것이 '에로 게임'. 아코와 리코는 케이타에겐 비밀로 야한 게임을 손에 넣으려고 하는데….
