Naru Sakuragi

Kirari, a elementary school student who lacked confidence and always spent her days alone. She loved drawing, and her sketchbook was the only friend she could open up to. One day, she woke up to find a mysterious girl who had appeared and forcibly dragged her out into the outside world. As she experienced new sights, new experiences, and a series of colorful firsts, changes began to take place in Kirari's heart...

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.