Yuki has no friends at school and her only company is her pet robot Lilly. In order for Lilly to be allowed into school with her beloved master, she pretends to be a human.

However, a certain boy from the same class finds out her secret. What will our sex robot heroine do to silence him…?
*All characters depicted in this work of fiction are adults, regardless of their visual representation or textual description, and are not based on any real person*