Seisou no Shinrishi

The hearts of the hero's party have grown weary. A world where humans and demons are at war. The heroes have been facing deadly battles while they're being hailed as valiant heroes by the townspeople. The Sage, Sofia, places her hope on Hoshino, a psychological counselor that transported from modern Japan, and believes that she can bring salvation to them. Her psychotherapy slowly but surely changes the hearts of the heroes, and soon it brings tremendous change to their world...

(Source: Shogakukan, translated)