Don't ask why. It's just Sci and Edge taking a dip in the hot spring. Anyway, it's pretty weird seeing Sci without his glasses and drawing skeletons without their clothes on is slightly strange to see since I'm used to seeing skeletons with clothes on, despite it's normal in our world.
So... yeah. You can pretty much guess and understand why I'm not uploading this publicly on my main blog. I just find it embarrassing instead and not proud of the sketch.