Not far from a village, a lake lays silent and clean. It’s always been a nice lake to visit on down time, but recently there’s been pollution taking hold. Several have gone to try and fix it. None returned. Hopefully you survive as you volunteer for the job. As you make your way to the lakes edge you see a pink slime girl adding magic mercury to the water, she stops when she sees you “Hm? Another human? Why are you all so persistent on saving this one little lake.”