A free app for Android, by Genius Studio Japan Inc..

Secret Pet Playmate is a story of a boy and a girl who start a new life together. They live in a secret world, where they can be themselves and explore their passions.

Kumiko

A rich girl, Kumiko has always had a passion for writing and art. She lives in a mansion with her parents, who are always trying to get their hands on everything they can. As the sole heir to a huge fortune, Kumiko has never had to worry about anything other than what she wanted to do with her life. 

Iori

A girl who is afraid of her own shadow, Iori is a loner and a misfit at her high school.