Peach Boy Riverside

In a magical world fraught with tension between humans, demihumans, and oni, Princess Saltorine "Sally" Aldike is on a quest to find a mysterious figure named Mikoto Kibitsu. As Sally travels, she discovers secrets that her royal heritage had kept her oblivious to, such as the immense power oni possess that could wipe out humanity.

Blessed with a power to fight against the oni, Sally has a sigil that appears as a peach, giving her superhuman strength. Despite this, Sally strives for peace between the three races and refuses to discriminate.

Mikoto, who also has similar abilities but to a greater degree, has a different goal. He seeks to destroy all oni, and will do whatever it takes to accomplish his mission. As Sally and Mikoto cross paths, their power will decide the fate of the world: harmony or destruction.