During the school break, Morikawa Kasumi was walking with her friends, while they were stopping at the gift shop some girls misunderstood her for a boy called Morikawa. When the school started for another semester, she found out that there is a boy called Morikawa in her class. He looks almost the same as her. This manga is about Kasumi, her friend and her family with the story focus on Kasumi the most.