Slow living with Princess

Having been banished from the party of the Heroine, on their quest to defeat the Demon Lord, Red has retired from the front lines and opened an apothecary in the frontier land of Zoltan. Now his happy new life depends on his relationships with a former tsundere princess, and his cute little sister, Ruti, who, as the Heroine, remains the world's only hope for defeating the Demon Lord.