Shion, a mysterious beautiful girl who transferred to Keibe High School, quickly became a popular girl in school because of her outstanding motor skills and innocent personality. In fact, she was an "AI" in the experiment. Shion suddenly sang in front of the lonely Satomi, and tried to make her "happy" in an unexpected way. Satomi, who learned that she was an artificial intelligence, and Satomi's childhood sweetheart and mechanical enthusiast Touma, the most popular handsome guy Xiaohao, the strong-willed girl Aya, and the judo club member Sanda were tormented by Shion, but they were also moved by her persistence and singing. Shion's action for Satomi actually dragged them into a big chaos. The slightly clumsy artificial intelligence and her classmates are intertwined into a movie full of warmth and fun.