One day, a package arrives at quirky introvert Gen's doorstop. When she opens the package, she discovers a truly human-like robot, beautiful like the girl of Gen's dreams. While trying to find a way to send the robot back, Gen accidentally hits a button that has the robot opening her eyes and coming to life. With the beautiful, flirtatious, playful and sexy robot by her side, Gen is completely swayed and decides to keep her, giving her the name Ai.