Himeno and her mother move into a rich mansion to work and live. Though Himeno looks like a normal child she hides a secret: whenever a man's hand touches her heart, she feels pain.
At the mansion she meets the son of the master, Mamoru and she is surprised since she doesn't feel any pain when he touches her. They promise each other to go see Mamoru's horse. When she arrives at the barn she meets a really fierce boy named Keigo who also came to the mansion to work. He calls Himeno over to help with the horses but poor Himeno gets bitten by a snake while trying to get water.
Meanwhile, Mamoru goes looking for Himeno and the workers at the barn say they saw Himeno run off to a place infested with deadly snakes and wild dogs.
Himeno is surrounded by dogs but like a knight, Keigo saves her on horseback. She thinks that if she comes into contact with Keigo her heart would hurt, but she doesn’t feel any pain at all. Afterwards, Keigo takes care of Himeno's wound before she faints.
Himeno dreams of her father who gave her the name Himeno hoping she would find her Prince Charming, just like a princess.
A really dark-skinned doctor appears and the doctor finds out that Himeno has a heart shape on her chest. The doctor seems to be scheming some evil plan.
Over the next few years, Himeno grows up peacefully. At the new school, Himeno meets Keigo again and Keigo tells her that in her heart there is a dormant rock that can make any wish come true and that she would be attacked by every man in the world at the heart and the body. Keigo is the one that is destined to protect Himeno.
