Mitsuha Yamano could not have had it worse. After failing to enter her university of choice and losing her entire family in an accident, she finds herself plummeting off a cliff due to an especially fragile guardrail. Through what seems to be the only bit of the fortune left in her life, Mitsuha's firm unwillingness to die allows her to be transported to another world, where she ends up surviving. In this foreign land, Mitsuha wanders around for days before collapsing from exhaustion and being rescued by a little girl named Colette. Not long after, she finds herself in yet another life-threatening situation, and her indomitable will shines once more, granting her an audience with a divine cosmic being. The entity reveals to Mitsuha that she has acquired not only superhuman regeneration but also the ability to transport between worlds at will. Armed with this new information, Mitsuha brainstorms ways to utilize her newfound power to its full potential. Realizing that she can take goods from Earth and resell them to the other world at a higher price, she resolves to save up eighty thousand gold coins to be able to retire comfortably.

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 Fenrir. The legendary beast swiftly negotiates a contract to become Mukouda's familiar, unable to resist the delicious dishes. With Fenrir by his side, Mukouda travels the world, earning his keep as an adventurer and merchant all the while enjoying delectable meals.

As the first commoner to attend the prestigious Arnold Academy of Sorcery, Ray White is immediately met with contempt from some of the students hailing from nobility. Unbeknownst to them, Ray's real identity is that of the famous Iceblade Sorcerer—a hero who led the country to victory in a past war and is one of the seven strongest sorcerers alive. Despite his legendary status, Ray wants nothing more than to live out the ordinary school life he never had. Ray quickly makes friends with some of the most influential students thanks to his kind and amiable nature. Unfortunately, as those with nefarious motives begin to make their move, Ray may soon have no choice but to use his true power to preserve the bonds that make his new life worthwhile.

Despite standing at the zenith as the strongest exorcist, Haruyoshi Kuga sought even greater power, which led to his demise at the hands of those who envied his might. As he draws his last breath, he casts a spell that allows him to reincarnate and swears to become more cunning, hoping that all his efforts will prove useful in his next life. Haruyoshi is soon reborn in another world as Seika Lamprogue, an illegitimate son of a noble family that prides itself on magic. However, his new family largely ignores him due to his lineage and magic deficiency. Nevertheless, the unbothered Seika leverages the knowledge from his previous life to make numerous valuable allies. As he begins to explore the true limits of his abilities, Seika must also be wary of the consequences that tarnished his past and avoid repeating the same mistakes.