The story takes place in the future world where technology is developing rapidly. At that time, artificial intelligence robots are no longer rare and are slowly integrating into human life. After failing the college entrance examination, the 18-year-old youth Mizuki Tsukasa (voiced by Uchi Takumi Yasuaki) came to work at SAI with the help of his parents. The main product of SAI is the humanoid intelligent robot called "Giftia". Mizuki Tsukasa was assigned to work in the terminal department. After arriving at the office, Mizuki Tsukasa discovered that the main responsibility of this department was to recycle robots that were about to be scrapped. Here, Mizuki Tsukasa met a girl named Ella (voiced by Amamiya Sora), who is actually a robot. Ella looks indifferent and not good at speaking, but has an unexpectedly cute side. In this way, Mizuki Tsukasa and Ella became partners at work, and a sincere friendship gradually developed between the two.