Touya Houjou, now with blessings from five goddesses, continues his journey into the cave kingdom of Ares—where the stronghold of the demon lord’s army is located. With a captive Great Demon General in tow, Touya’s party is guided to the altar where the demon lord was sealed. Little do they know that Touya himself is the key to the demon lord’s revival! Our hero and the demon lord finally face off, but then a demon general opposing the demon lord jumps into the fray, turning it into a three-way battle. It’s now time to discover the true power of the Unlimited Bath! The latest entry in this parallel world bathing fantasy is filled with hot air, hot girls, and of course, hot baths!