Intelligent Assisting Missionaries Agency, or I.A.M.A., dispatches Agent 18 on a reconnaissance mission on the heir of the Black Sky Limited, a highschooler, Denji Kurosaki. With the help of the A.I., or Assisting Intelligence chip, Agent 18 goes undercover as a student named Juusaki Hachiko in t...

After his rejection of his confession, Bari Deliruu decides to kill himself, but before he does, he gets transported to a brand new world. Is he dead, or is he alive? Is this the same world, or is it new? Questions that he sets aside for later as he tries to learn more about this seemingly new wo...