Liki and Kika are two sisters who don't really remind eachother :Liki is the night and Kika is the day. Liki says she can't stand any light, she rarely speaks and shes a big mystery even for her family. Kika is perky and usually happy. Liki used to be social and colorful when she and Kika were little, they used to play together all the time. They created a language only they are able to understand and they still communicate with it together whenever Liki agrees to speak. This story follows their daily lives and also features materials created by Liki and Kika themselves.