Rabbit Tsukigata Setsuichi, a student living a peaceful life in Japan, was suddenly summoned to another world as a warrior during a class break. He hears a mysterious voice and is asked by the country that summoned him to become a powerful warrior to save the world, with the promise of high treatment and a guaranteed living. However, after a conversation with his classmates, he decides to leave the castle and explore the world a bit. In the end, he volunteers to become a soldier, deciding to build his own achievements and become an adventurer rather than being pampered.