Fatigue-Curing Spa (疲れを癒す温泉, Tsukare o Iyasu Onsen, lit. Fatigue-Curing Hot Spring) is an event in Tomba! 2: The Evil Swine Return.
Bring a bucket of hot water to Kainen, so he can take a bath.
When arriving at Ranch Summit, one of the first things you will see is Kainen standing in his swimming suit out in the cold. Go and talk to him, and he will ask Tomba and Zippo if they can bring a bucket of hot water to the bath.
The hot water can be obtained from the hot water tap in Pipe Area. Bring the bucket back to Kainen and the event is cleared.
If you bring a bucket of cold water from Town of the Fishermen, he will shiver from the cold water and state that they need to bring water from the Pipe Area. If you bring the holy water from the Water Temple, the item will be grayed out, and you will be unable to give it to him.
- If Tomba breaks the curse before filling the spa with hot water, Kainen will still state that he is "going to freeze to death", despite it no longer being winter.