Shintarou Kisaragi's life as a shut-in would have been perfect if not for the cyber girl Ene, who lives in his computer. Upbeat and cheerful, she enjoys playing pranks, in complete contrast to his own apathy. It is due to Ene's daily antics that his keyboard breaks. The dread of not having the use of his computer is too much to bear, and he sets out to replace his keyboard. And so, in the dead heat of summer, Shintarou leaves his room for the first time in two years.