>>16177
I think it's posted a little out of order, 2nd panel looks like that's supposed to be #1. I think they have that small red device to breathe under water. Looks like they were doing some kind of performance in front of all of those sea creatures, then they went off to have sex, and when they started running out of breath, the red head girl reached down to grab the breathing device, but it wasn't there. So the girls drowned, and the sea creatures eventually realized it.