Iris on Rainy Days by Takeshi Matsuyama

Translated from Japanese Completed Drama Romance Slice of Life Psychological Tragedy Science Fiction
The story is centred around a cute android who initially had a happy life with her master who dearly loved her. But she was then struck by a series of misfortunes and ended up in a robot-equivalent of concentration camp. Through experiencing and witnessing the sufferings towards herself as well as the people/robots around her, she eventually gained a better appreciation of life.

Alternative names : Ame no Hi no Iris

1: Iris on Rainy Days