Chosen by the Church's god, Origin, a young country girl named Flum Apricot is enlisted in the hero's party and expected to fight demons. However, her one innate skill, Reversal, has no practical use, and the party's sage, Jean Inteige, treats her as a burden, eventually selling her off to a slave dealer. In the slave dealer's dark dungeon, all hope seems lost. But in a moment of desperation, Flum discovers that her skill actually turns the negative energy of cursed weapons into power, which helps her slay the slave owner and escape with another captured girl, Milkit. Now equipped with the means to fight and survive, Flum embraces the career of an adventurer and aims to lead a happy life with Milkit, away from the grim machinations of the Church.

Ken Usato, an ordinary high schooler, wishes for something fantastical to occur in his unremarkable life. Such an opportunity arrives when he is transported to another world alongside Kazuki Ryuusen and Suzune Inukami, two prodigious members of his school's student council. Arriving in Llinger Kingdom, the three are deemed to be the heroes tasked with stopping the impending invasion by the Demon Lord's army. However, this is a misunderstanding—Usato was summoned by accident and, unlike his two friends, is not one of the heroes. Despite this disheartening revelation, Usato learns that he has an aptitude for the extremely rare healing magic. This catches the attention of Rose, the intimidating captain of the kingdom's Rescue Team, who forcibly takes custody of Usato to mold him into a full-fledged healer. As he undergoes grueling training under Rose's supervision, Usato resolves to become capable enough to protect his friends from the dangers of this world.

Tomokui Kanata has been re-incarnated in the weakest goblin, named Goburou, after having undergone an unfortunate death. However Goburou has retained his previous life's memories, an unusual evolution, as well as becoming strong enough to gain status boosts from eating. In this alternate world of survival of the fittest, events unfold with competent subordinates and comrades, delightful case of the tail-wagging dog...