Rami is a human who loves to wear gothic lolita fashion. She pretends to be cold-hearted, but in reality she is a very compassionate person. She talks to herself a lot. She is restless, she tends to get carried away and spin out of control. As a secret agent, she follows Naruto and Choco around to learn the secret of "CHOCONARUTO", though she is unsuccessful.

Choco and Naruto, android sisters with human hearts, were created by a mysterious "Master" as assistants to help in the process of baking "CHOCONARUTO", a pastry that brings happiness. However, their Master has disappeared on a search for true happiness. Choco and Naruto struggle to make the pastry alone, so they embark on a journey to find their Master.