After 26-year-old Kentarou Momose develops health problems due to his boss' abuse, he quits his job and joins a different company. Now, he hopes to start anew under the care of his mentor and direct supervisor, 34-year-old Yuusei Shirosaki. Shirosaki is a capable boss admired by his coworkers, which makes Momose fear letting him down and reliving the past traumas. However, Momose can rest easy, as Shirosaki is always delighted to help—even if he looks absolutely ridiculous doing it. Although it may take some adjusting, Momose realizes that there is no need for caution around his new, endearingly eccentric boss after all.

Rud is a tank of the Hero's Party and is said to have the highest defense ever in history. The party often does labyrinth raids, but to Rud, it means more than just a raid. To cure his beloved sister's illness, he is in search for the wish-granting treasure that might be hidden in those labyrinths. But one day, the arrogant hero kicks him from the party after an unsuccessful raid attempt, blaming it on his skills whose effects he is still unaware of. With nowhere else to go and nothing to do, he decides to return to his hometown, where his sister is waiting. On his way there, he saves a girl who was being attacked by a monster. Unexpectedly, this girl has an extremely rare skill called Appraisal. Thanks to her skill, Rud is able to discover the truth behind his unknown skills, which turn out to be very powerful skills. With a defense of 9999 and powerful skills, thus begins the adventure of the strongest tank, Rud! (Source: Square Enix)

The chaotic aftermath of a confrontation between Jinka Yamato and Yazen results in the power dynamics between the magically gifted katawara and humans being turned upside down. As the news of the downfall of dangaishu—the katawara-hunting monks led by Yazen—spreads across the country, rogue groups of katawara start to form, worsening the already-fragile relationship between them and humanity. Having lost faith in his abilities, Shinsuke Hyoudou now spends his time heavily drinking in the company of Senya, a former enemy of his who controls one thousand katawara within his body. Senya indirectly causes the death of the father of Tsukiko, his newfound friend, after a surprise attack of a local god gone berserk. Despite the circumstances, Tsukiko holds no grudge against Senya and is determined to become Shinsuke's disciple no matter what. Although Shinsuke refuses to become Tsukiko's sword instructor, he reluctantly agrees to let her travel with him and Senya. While the unlikely trio heads towards their next destination, Tama Youko continues her journey to find the trail of Jinka, the nine-tailed fox who has the power to destroy the world.

On the outside, Agastia is a firm specializing in entertainment, well-known for the theme park it operates. However, beneath such an exterior lies a monumental secret: Agastia is one of various highly advanced evil organizations that aim for world domination. Despite its true nature, the company boasts enticements that make it worthwhile to put up with the work environment. Led by its great leader Akashic, Agastia has recently become a frontrunner in reaching its fellow groups' common goal. Working for Agastia's Monster Development Division, Touka Kuroitsu is a researcher who primarily does fieldwork due to the eccentricities of her seniors. Kuroitsu's everyday jobs also include giving abrupt presentations and proposals, meeting ridiculous expectations for monster designs, and accompanying said monsters to face inevitable defeat by Agastia's enemies. Nevertheless, nothing will stop Kuroitsu from doing her best if it means getting the promotion she desires!