Okay... this isn't a perfect fix, bit it is the best we can do without using KKS.
First things first... not sure what version of DarkSoldier27 Project Diva H-Maps they are using, but I count get it to work. Just load whatever map you like.
Next, deselect Sphere (General) in the workspace.
Now, you have some options. One, you can leave it like that and enjoy your tongue-less scene. Two, you can also remove the bottom hand by deselecting Alpha Hand (R). Three, replace the character with another one and they will have a tongue. This will also allow you to adjust the tongue (more on that later).
Five... and this is what I did for you... select the character (the top item in the workspace), click on Mat. Editor at bottom of workspace, filter for tang, and select enable. This brings her original tongue back. Now, you can edit the tongue.
To do this, with the character selected, select KKPE, adv. mode, blend shapes, then scroll down to Tongue. Find a slider that works close enough (I thought 30 did decently). Then go to Bones and search for mouthcavity. Go to Scale and adjust it up to get the tongue to fit right. Adjust Rotation and Position as you see fit.
And... there you have it... a reasonable(?) facsimile of the original scene. Obviously you loose a bit due to the right hand, cum, and saliva not having node constraints to the tongue... but that is beyond me at this point.
Hope this works for you!