From Kodansha:
Saltherine, princess of the Kingdom of Aldarake, dreams of traveling the world a dangerous dream in a land where monsters roam the countryside. A chance meeting with a wanderer named Mikoto gives her hope that she might still find excitement in her life. But then she discovers the wanderer’s true identity: Momotaro the Peach Boy, demon slayer of legend. Though terrified by his bloody profession, Sally feels driven to follow Momotaro and learn more. But is this curiosity, or a magical connection that goes deeper than either of them realize?

A remake of the webcomic of the same name.

Original Manga