The beautiful and mysterious Shion (VA: Tao Tsuchiya) transferred to Keibu High School, and she quickly becomes popular due to her open-hearted personality and exceptional athletic talent... but she turns out to be an experimental AI! All of the sudden, Shion sings out loud in front of Satomi (VA: Haruka Fukuhara), the class' loner, and does other unexpected stuff in order to make Satomi happy. After finding out that Shion is an AI, Satomi and her childhood friend, engineering geek Touma (VA: Asuka Kudo), steadily warm up to the new student. Along with the popular and attractive Gocchan (VA: Kazuyuki Okitsu), the strong-willed Aya (VA: Mikako Komatsu), and judo club member "Thunder" (VA: Satoshi Hino), they become more and more moved by Shion's singing and earnestness even as her antics bewilder them. But what Shion does for Satomi's sake ends up involving them all in some serious pandemonium. Get ready for the heartwarming story of a ratehr clumsy AI and her classmates!神秘转学生诗音在开学的第一天，跑到班上的边缘人悟美旁边献唱一曲，并频频询问「悟美，妳幸福吗？」，此举动让悟美一头雾水。而诗音出类拔萃的运动才能、开朗热情的个性很快的就成为了学校的风云人物，但她却时常表现出异于常人的行为，这才发现原来诗音是正在测试阶段的AI机器人；得知诗音是AI后，机械狂热者十真、风云人物阿后、个性强势的绫和憨厚的柔道社社员闪电，逐渐被诗音专注热情和歌声打动而变成挚友。一心想为悟美带来幸福的诗音，即将被卷入失控的大风暴中……而他们又会如何面对这场风暴呢？