Henkyou no Ofuroya-san, Harem ni Naru: Yamaoku ni Aru Sabireta Onsen no Kounou ga Cheat Sugite Onna Boukensha ni Daininki na Ken - Vol. 1 Ch. 4

[Salfaro]

Oh, so it's the "town of abnormally strong people" trope, where I guess Rio's just an abnormal healer type.

 

[VooXoo]

Seems like that is a village were heroes retired.