After an unfortunate incident caused him to lose his job, Arata Kaizaki has been struggling to return to the job market. One day, however, a man named Ryo Yoake approaches him with a proposal that seems to absurd to be true. Yoake claims to work for the ReLIFE Laboratory, an organization tasked with ‘rehabilitating’ NEETs (Not undergoing Employment, Education or Training) like Kaizaki by sending them back to high school for a year.