Alice is realistic, especially about love. One day, she is taken to the world of heart, which is full of danger. For example, an owner of a hat shop is a gangster, and every theme park worker carries a gun. Almost all of people are dangerous. But she somehow starts to enjoy her life there after she is forced to take a drug not to be able to come back to the original world. How is she going to come back? And is she going to fall in love with someone?

Little is a vampire girl. Radou treats her like his little sister and Vlad Dracula is like her father, though they are not blood-related. One day, their hiding place is found by vampire hunters and they are forced to get out of a town. Where they arrive is Japan. They sleep at an old house during the daytime and act as vampires at night. Little meets a boy and longs for human life. Radou denies it, but Dracula allows her to join a school. She makes friends and enjoys her school life. But one day, a messenger comes to their place and tells them to go back to the devil world....