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.

The balance of the world is deeply shaken when malevolent gods known as the Four Perils break their seals and disappear together with eight million minor deities. In the absence of gods, lands become barren and famine looms in the country of the Eight Immortals. In order to restore the fragile harmony, kashi—gifted dancers and singers—must hunt the missing gods in other realms, use their performance skills to charm the deities, and seal them using the power of their rosaries. Although a master dancer, Ichiyou is ridiculed by his peers for his lack of singing talent. Nonetheless, the young kashi is tasked by the Eight Immortals to bring back the Four Perils before the world plunges into complete chaos. Helped by his familiars Tenkou and Kaka, Ichiyou embarks on the perilous mission given to him, with his search leading him to modern-day Japan. If he hopes to save the world, Ichiyou must also uncover the truth behind the Four Perils' disappearance—but this event seems to be disturbingly intertwined with his own past.

Due to her mother's work, Chizuko Date has never remained in one place for long or grown attached to anything in particular. However, while temporarily staying with her grandfather Suikyou, she witnesses something extraordinary: a magical girl named Berry Blossom fighting against Chroma, member of the evil organization Fossa Magna. Seeing Berry Blossom save the day ignites a passion in Chizuko, and she swears to be a fan of the new magical girl in town thereafter. As time passes, Berry Blossom's popularity dwindles due to the incompetence of her opponent. When Chizuko randomly encounters Chroma himself, she does not hold back her complaints against him. For his part, Chroma does not enjoy being defeated again and again; moreover, Fossa Magna will force him to resign if he continues losing. In desperation, Chroma begs Chizuko to become his second-in-command and help him with his evildoings. For the sake of Berry Blossom regaining the spotlight, Chizuko must question whether it is right to join forces with the magical girl's sworn enemy.

Following a bad experience teaching at a public high school that resulted in a break from working, Haruaki Abe eagerly takes up a new job at Hyakki Academy. Despite his cowardice, the novice teacher is motivated to do better this time around. However, his mind quickly changes when he finds out that everyone at the school is actually a supernatural being known as a youkai, leaving him glaringly out of place as the only human around. Facing his class as its new homeroom teacher, Abe immediately becomes a target for the students' antics due to his quick-to-scare nature. Though as the man starts to learn more about the creatures, as well as himself, getting along with the unruly group might not be as hard as he originally thought as their school lives begin to get more vibrant.