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

Red is the older brother of a young heroine fighting against the Demon Lord. Nevertheless, he only possesses the Guide ability, preventing him from using magic, martial arts, or even special abilities, making him seem utterly useless. Thus, he was expelled from his sister's party, heartbroken. Now, he only wishes to lead a quiet life on the frontier, in Zoltan, and open an herbalist shop. However, the arrival of Rit, a beautiful adventurer, will turn his daily life upside down.