After socially awkward technology specialist Manabu "Gaku" Taira is saved from thugs by the outgoing Haru Tennouji, the two men find that they get along with each other well. Years later, Gaku, who is having a tough time getting a job due to his timidness, is convinced by Haru to apply for a position alongside him at Dragon Bank, one of Japan's largest IT companies. During their interviews, the company's board director, Kirika Kokuryuu, takes an interest in Haru and Gaku's contrasting personalities. However, Gaku does not get hired by the company, leading Haru to quit the job on his first day in protest. Nevertheless, they decide to embark on an ambitious plan of making a trillion dollars. In order for their scheme to come to fruition, Haru and Gaku start looking for potential investors, but everyone rejects their extravagant idea. In spite of that, the two soon find themselves getting an offer from Kirika—and with her investment, they might just be able to reach their goal.

In recent years, creatures known as Kaii have frequently attacked cities and wrought destruction. Exterminating these monsters quickly became a popular and well-respected profession, carried out by magical girls. More than five hundred magical girl companies, ranging from small ventures to large corporations, offer their aid to those who need it. Kana Sakuragi is a studious college graduate struggling to land a job despite attending numerous interviews. But when a Kaii attacks during her latest interview, she finds herself assisting the magical girl responding to the crisis. Although she lacks battle experience, Kana relies on her exceptional memory and knowledge to help subdue the monster. Hitomi Koshigaya, the headstrong magical girl who faced the Kaii, recognizes Kana's potential and invites her to join Magilumiere Magical Girls Inc.—the startup where Hitomi works. Wishing to make a difference, Kana accepts the offer to become a magical girl herself. While Kana may not be suited for the corporate world, it soon becomes clear that her true calling is to rise as one of the most talented magical girls in existence.

As dungeon-like treasure vaults started appearing throughout the land, more and more people began signing up as treasure hunters—risking their lives to obtain the vast riches and ancient relics inside. In the imperial capital of Zebrudia, the top hunter party is the Grieving Souls—a group of six childhood friends led by Krai Andrey, who is thought to be the strongest of them due to having a reputed wide array of skills. However, Krai actually has no special talent. His accomplishments are actually the result of his friends being overpowered. Krai has repeatedly attempted to leave the party out of fear his lack of aptitudes would one day cause his companions' downfall. Nevertheless, everyone around Krai thinks differently, making him feel obligated to remain the group's leader.

College student Tokiwa gets invited to a mixer by his female classmate Suo. But when he arrives with his friends, they're greeted by three dazzlingly handsome men?!