One day, all the students in the second grade of junior high school were transferred to another world. The princess of another world summoned them to make up for the lack of strength. Students who are threatened and decide to follow the princess are given a magical check to check their abilities. While everyone was sorted according to the results, the results of Kento Kokubuns judgment were missing. I was banished because it was judged to be useless. However, there is actually a terrible ability hidden in Kento ... Kento, a second-year middle-aged student of life-size, aims to rescue his classmates with his fellow skeleton.