Right in the middle of the 21st century
One world gets a mysterious blessing, namely the job system, the job system is arranged according to each person's dreams, usually the job system will be obtained when they are 11 years old, there are lots of jobs that can be obtained, especially according to their respective fields, but there is something strange about Glenn, who is 16 years old, he doesn't get the job system, this is probably because Glenn doesn't have any dreams at all, he just wants to continue living, maybe that's his dream, but when suddenly the world starts to become chaotic, system damage appears which causes riots, where many strange jobs appear, such as wizards and others, some of the group are unjust people. Very evil at that time, normal jobs were no longer needed. Everyone was treated like animals, including Glenn, who didn't have a job at all. When chaos struck, Glenn was attacked using a crowbars, he almost died, but fortunately he was still alive. This incident caused a strange case. Glenn suddenly got a job system, but it wasn't just ordinary, he got a jobmania system.
