Extremely shy and plain guy Yuuzuru was just dumped by the girl he had a crush on. At that time, he found and purchased an AI-equipped humanoid pet robot, Nene. Over time, emotions, personality, and even sexual preferences are programmed to his liking in AI Nene. And through his cohabitation with Nene, his shy personality gradually softened, causing him to become distracted by a woman he had been pining for. He finds himself at a crossroads, having to choose between a human woman who doesn't go his way or his preferred robot, Nene... Eventually, AI Nene begins to develop emotions. He realizes that the 'heart' they have nurtured together exists.
