Shin no Nakama ja Nai to Yuusha no Party wo Oidasareta node, Henkyou de Slow Life suru Koto ni Shimashita

Gideon once fought beside his younger sister Ruti, the chosen Hero destined to defeat the Demon Lord. When the party's Sage declared him too weak to remain useful, Gideon left without telling Ruti the truth and disappeared to the frontier town of Zoltan under the name Red. There he finally achieves a quieter dream: opening a small apothecary and living far from war. His past finds him anyway when Rit, a princess and former adventuring companion, arrives and asks to move in. Their peaceful days of medicine, cooking, and growing affection are everything Red wanted, yet the Hero's journey continues without him. As trouble creeps toward Zoltan and Ruti struggles under the burden of her divine role, Red learns that leaving the party did not mean leaving everyone he loves behind.