Inoue Masaki is a NEET (Not in Education, Employment, or Training) who recently quit his job and now spends most of his time in his room eating snacks and playing games on his phone. One day, he is suddenly thrown into his closet by a mysterious figure and transported to another dimension. There, Masaki meets Masaki No. 1, an identical version of himself dressed in a middle school uniform, who explains that he is on Planet Inoue—a planet inhabited by Masaki clones that were mass-produced under the direction of an alien who stole part of his consciousness, known as Papa. Identified as Masaki No. 88, Masaki learns that Papa seeks to create an Inoue Masaki worthy of life on Earth, sending the failures to live out their days on Planet Inoue. Guided by Masaki No. 1 and a crew of extraterrestrial Masaki-makers, Masaki undergoes a bizarre journey of self-discovery that forces him to consider the true value of his life.
