It's a story in a certain world that is different from here. Flora, who attends a girls' school in Tokyo, is attacked by a monster that suddenly appears, but her life is saved by Rize, a resident of another world. Why was he attacked? What exactly...

Day-to-day hero was bored in life: Your pick up the book on the way home of the school. The book in this that you can receive a summons from another world, Your response to the summons. It met with summoned earlier than a princess of the country....