Henkyou no Ofuroya-san, Harem ni naru ~Yamaoku ni Arusabiret...

A Cheat Hot Spring That Heals Female Adventurers, Makes Them Stronger… and Leads to Steamy Mixed Baths?! Deep in the mountains, a young man named Rio manages an old, run-down hot spring. Using his mysterious skill, he adjusts the properties of th...