Combatants Will Be Dispatched!

After a brutal war, magic swordsman Kyle defeats the Demon King but is left dying. A crimson crystal sends him four years into the past to his once-destroyed hometown where he finds his lost loved ones alive. Armed with future knowledge, Kyle vows to prevent the coming tragedy and rewrite fate.

After dying in the act of stopping a crime in modern Japan, our hero is reincarnated as Cain von Silford, third son of a noble family in a world of swords and sorcery. In his new life, all children receive a blessing from the gods...but Cain is unexpectedly blessed with an absolutely enormous, over-the-top cornucopia of magical powers. If his dream of traveling the world as a free spirit is to come true, he can't reveal too much of his potential to the wrong people. A light-hearted, escapist adventure in another world begins!

Bayron City -- a Mega-Float type city in the Pacific Ocean, which doesn't belong to any particular nation. As the mine for Orgonium, a new energy resource, this city is the most noticed in the world right now, and here special cases caused by demons called "D Hazards" has been occurring frequently. Only a handful of people know about the existence of D Hazards. They are handled by PMCs (Private Military Companies). Shu is a young man living in Bayron City who runs such a company, but his company is tiny. On top of that, he cherry-picks his jobs, so he is always in a bind for money. His life, both publicly and privately, is being supported by the beautiful high school girl Kisara who attends a school in Bayron City.

For 30 years, thousands have traveled to other worlds. The few that return keep the powers they had in those worlds. Akatsuki Ousawa returns from the world of Alayzard with the defeated Demon King's daughter, Miu. Miu pretends to be Akatsuki's sister to hide her true identity. They join Babel, a school for inter-dimensional travelers, and struggle against the student council to uncover the truth behind the school.