It must be nice to be an android. Something you don’t know? Simply install it. Masato isn’t an android, but his neighbor is, and he has been entrusted with looking after it. The android known as Koto Nakahara appears to be almost identical to a human, but if she goes without water, her fuel source, for too long… she could explode! With tests looming over, will Masato be able to study for his exams and be able to keep an eye on Koto the android?
Yukimi Kobayashi spends most of her time alone, but that isn’t the strangest thing about her. Yukimi is actually an experimental android that has been placed in school to allow her to develop like a normal child. However, Yukimi didn’t always spend her time avoiding people; she used to have many friends. What are the secrets behind Yukimi and why has her personality changed so much? Perhaps the only person who can help her is her teacher.