Peach Boy Riverside manga volume 1 features story by Coolkyousinnjya with art by Johanne.

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 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…?