An Incompetent Explorer Who Failed to Make His High School Debut but Mastered Being a Human Being

At one point, in Japan, where monsters and dungeons appeared all over the world, Fuhito Satou registered as an explorer to make his high school debut. However, the aptitude test revealed that there was no level, skill, or ability score.
Although he was a desperate ordinary person, he remembered that only the item of skill level was displayed in the status.
A normal person who has no level, skill, or ability score and is embarrassed to be an explorer and cannot tell anyone, is nervous and fails to make his high school debut. Nevertheless, as high school life progresses, beautiful girls gather around him. He does not know the real reason.