- c8 + Bonus (end) by Yuri ProjectSep 12, 2017
- c7 by Yuri ProjectAug 29, 2017
- c6 by CXC ScansApr 25, 2016
- c5 by CXC ScansJan 1, 2016
- v1c2-4 by CXC ScansJul 12, 2015
- v1c1 by CXC ScansJun 5, 2015
In an ordinary neighborhood, a team of engineers are developing a robot they call Praha, who looks like an ordinary human high school girl. Chika, a 4-year-old girl who lives next door, meets her neighbor and learns her secret. The two girls become friends and high school classmates, and Chika teaches Hiro—as she calls Praha—about human emotions, including love.