In place of Ratman who cancelled at the last minute, Mana joins Kitaro and the others on their trip. They're headed to an inn exclusive to youkai - the Immortal Onsen. Everyone's getting the most out of the hot springs, but suddenly, the inn is wrapped in an unsettling noise. The source is underground, the riotous energy from Mt. Fuji. Appeasing it is the job of the owner of the inn, but the current proprietress, Nebutori, is so fat she can't always do her work. Mana offers to serve in her place. Mana and Kitaro go into the caves of Mt. Fuji, and a huge shadow closes in on them...!?
Can't you all cut loose for once
at the hot springs?
ألا يمكنكم أن تطلقوا العنان
لأنفسكم في الينابيع الساخنة على الأقل؟
Könnt ihr nicht zumindest hier
etwas mehr Begeisterung zeigen?
¿No pueden divertirse por una vez?
¿No podéis divertiros por una vez?
Vous ne pourriez pas vous lâcher,
pour changer ?
non pensate che almeno alle terme 
dovreste fare baldoria con tutte le vostre forze?
Não podem se soltar um pouco
uma vez nas águas termais?