Alice in the Country of Hearts

Story
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?