In a time when the great war between five rival races for supremacy on Earth ended with humanity's victory led by the hero Sid, the world suddenly gets "overwritten" right before the eyes of a boy named Kai. In this rewritten world, Kai witnesses humanity's defeat in the war as a result of Sid's absence—where dragons and demons now rule the land, and Kai himself has become a forgotten existence to all humans. However, after encountering the mysterious girl Rinne, Kai resolves to break free from this rewritten fate. In a world without a hero, he inherits the sword and martial skills of the hero (Sid) and challenges the powerful enemy races that dominate the land.

Misery seems everlasting in Miyo Saimori's life. Born into an arranged marriage, she was quickly discarded after her mother's tragic death. Her father remarried, and her younger half-sister Kaya received all the affection, while Miyo was degraded to a lowly servant. Lacking the strength to fight against her family's abuse, Miyo loses hope that her luck will ever turn. Unexpectedly, Miyo's father summons her to deliver surprising news: she is to marry Kiyoka Kudou, the head of the distinguished Kudou family. Despite his noble background, Kiyoka is known to be a callous man who has thus far dismissed all of his former fiancées. Upon arriving at the Kudou household, Miyo expects coarse treatment and to be tossed aside. However, contrary to her assumptions, Kiyoka shows her the kindness and love that she has desperately needed. Marrying Kiyoka may be Miyo's one chance to break free from her neglectful family and embrace a life of happiness.

TV version of including an entirely new first episode. The first episode depicts Rengoku as he embarks on his journey to the Mugen Train. The remaining episodes will add about 70 new animation cuts and new background music, as well as a new trailer. (Source: ANN)

Not even a hero, Takumi Iruma gets accidentally mixed in with a group of heroes chosen to be summoned to another world. As compensation for the mix-up, a goddess offers him the right to choose any skill he wishes for! Hoping for a peaceful and quiet life that has nothing to do with fighting or going into battle, he chooses a seemingly boring creation skill. However, it turns out "alchemy" is the most powerful skill that allows him to create everything from a holy sword to flying ships! This cheat skill he unexpectedly acquired turns him into a wealthy merchant and makes him undefeatable in battles! A heartwarming adventure story about (possibly) the most powerful alchemist in another world!