The human world has friendly relations with both the barren demon world and the lushly-forested spirit world. This spring, the demon king’s third son, Touma, came to study abroad at Shikikaze Gakuen in the human world. It was his first time in another world and he was excited to gain more experience for the future. Shortly thereafter, a student from the spirit world, Haruka, asked him to be her husband. Now, a spring breeze is blowing through the human world.