Deriwo no Oshigoto

Sakurako, a shut-in and an obsessive fan of ero-ge (erotic fantasy games) hires a call-boy, Fuji, to try and experience the feelings of her favorite game character. Things go awry when a clumsy stumble causes the carefully-hidden otaku-ware and an erotic game on the TV to unpause—revealing Sakurako's ulterior motives. But it turns out that Fuji is a fan of the same game—so they end up spending the night playing games instead. The two keep in touch, and Sakurako is able to find the courage to go outside, if it means spending more time with Fuji (and fangirling out at a game-themed cafe!).

(Source: Kodansha USA)