@Matt Being street yukkuris, they've got to be starving or close to it. I could see a desperate parent trying to grab a few mouthfuls of juice to get the energy to go out and forage some more. Even while it's raining? The juice will disappear soon and then what will Marisa do? That, and yukkuris aren't really known for their logic.
Then you have koMarisa, wanting to be just like Marisa. It's going to go hunt too! Or is also very hungry and not listening to the other parent. So now there's two melting yukkuris.
That's what I hope is happening, not some more selfish scenario. Also, looks like it's an Anko pic. Tagged accordingly.
I will speculate the same thing as three. An adult yukkuri can probably do a quick in and out without getting too hurt, but the koyukkuri, needless to say, is fucked.
Either that or Marisa is just so hungry/desperate that she has lost all her senses.
Or both. All it's getting at this point is dirty rainwater with a hint of sweetness. So the Marisa keeps drinking, trying to get the rest, losing energy while exacerbating the damage...
Even if it did get in and out with minimal damage, the Marisa's still in trouble. Injured and the primary provider (presumably)? Not good.
Also looks like one of the koReimu's in a bad way. Or sleeping.
...I might have to write something now. There's too much here to analyze.
Summary: It's the rainy season; it's been raining for days, and the humidity is very high. Because of this, the koReimu in the tent (the one to the far right) has gotten sick (moldy).
A Mister Human shows up, and Marisa begs him - in an astonishingly respectful way - to give medicine to her little one. Anon knows that a single dose of medicine wouldn't be enough; mold grows tendrils inwards. The only way to get rid of the mold is either a continued course of anti-fungal medication (pills for athlete's foot) OR peeling open and scraping the infected area clean of fungus.
Willing to do neither, Anon decides to troll. He pulls out a can of orange juice, pops the top, pours it on the ground, and says "Come get it befor the rain washes it away!"
Marisa goes for it, and licks the ground trying to get the juice. All she gets is a mouthful of dirt, and her back gets injured because of the hard rain.Sitting in the rain screws up her "feet", so she can't move.
Brave Baby Marisa tries to save "Daddy", but fails because of the rain. Her feet melt in a puddle.
Getting rid of respectful Marisa dude what a waste of a good yukkuri should taken them to the factory so they could be used in the pet breeding program. He probably could have made decent money off of it.