Intrepid adventurer Bell Cranel has leveled up, but he can’t rest on his dungeoneering laurels just yet. The Hestia Familia still has a long way to go before it can stand toe-to-toe with the other Familias of Orario — but before Bell can set out on his next mission, reports of a brutal murder rock the adventuring community! One of Bell’s trusted allies stands accused of the horrible crime, and it’s up to Bell and his friends to clear their name and uncover a nefarious plot brewing in the dungeon’s dark depths. (Source: Sentai Filmworks)

A nameless sword wakes up to discover he has been reincarnated from his former life as a human. With his power of telekinesis, he moves around this new world, acquiring several skills and abilities. When the sword comes upon a forest filled with monsters, he meets a young girl fleeing from a beast. Grabbing the sword, the girl easily defeats the monster. After introducing herself as Fran, she names the sword Shishou and officially becomes his wielder. The two set out to become adventurers, but unfortunately for Fran, she is a member of the Black Cat Tribe—a Beastkin group with a bad reputation. No member of this tribe has ever evolved into a mightier beast, but Fran plans to be the first and achieve her parents' dream. As Shishou promises to remain her sword until she attains her goal, they form an unstoppable partnership of impressive strength.

Salaryman Tsuyoshi Mukouda is accidentally summoned as a hero to the Kingdom of Reijseger in another world to help defend against their enemies. Wary of the royal family's true intentions, Mukouda is able to talk his way out of the situation due to his non-combat skill, Online Supermarket, which is deemed useless. However, this power proves to be anything but useless. With this ability, Mukouda is able to cheaply purchase food products and utensils from Japan—most of which are considered luxuries in this world. As Mukouda cooks up a storm using his ability, he catches the eye of the fearsome mythical wolf Fel. The legendary beast swiftly negotiates a contract to become Mukouda's familiar, unable to resist the delicious dishes. With Fel by his side, Mukouda travels the world, earning his keep as an adventurer and merchant all the while enjoying delectable meals.

At birth, mages randomly acquire one of the four crests that represents the extent of their magical capability. Equipped with a crest specializing in creation, a man named Gaius reached the ceiling of his potential, becoming known as the world's strongest sage. Despite his overwhelming power, he is unsatisfied with his abilities and desires to possess the mark suitable for close combat. Knowing that a person's crest is unchangeable, Gaius decides to reincarnate far into the future, hoping to alter his fate. Thousands of years later, Gaius is reborn as Mathias Hildesheimer, successfully obtaining his long-coveted crest. However, he is surprised to learn that in these times, magic has vastly waned, and the techniques that were once widely used are now nothing more than just a speck of legend. Moreover, the crest that he painstakingly strived to attain is now considered the weakest—merely dubbed the Crest of Failure. Nevertheless, Mathias naturally exceeds all expectations. He enrolls into the royal capital's Second Academy, acing every trial that comes his way. But soon after, Mathias discovers the dark truth behind humanity's downfall into magical mediocrity—demons—and endeavors to remedy the consequence of his millennia-long absence once and for all.