A HS2/AIS mod including two studio items, namely:
1. Naughty Tongue 1
2. Naughty Tongue 2
3. Naughty Tongue 3
Go to the page of Release on the right side and download the latest mod file.
Install them by dragging and dropping the mod file into the /mods/ folder or via KKManager, without running your Studio.
Go finding them in Studio by their item names. Add the tongue into the scene, parent it to your character's mouth and set the tongue's position to 0,0,0. Then, the tongue goes near by the chara's mouth, and you just need a little further adjustment in its position.
Also, you can disable the original tongue of the chara to let there not be two tongues crowded in the mouth. Select the chara, open MaterialEditor, and find and toggle the renderer of o_tang to OFF.
For changing the base color and the strength of bump (normal map), select the tongue and use MaterialEditor.
For animating them, enable their FK functions on the anim tab, then rotate the FK nodes to change their poses.
There are also some Blend Shapes added to these items, check and adjust their parameters on the Blend Shapes tab of the adv.mode of HS2PE/AIPE to morph the mesh of the tongues.
Sharp Tongue I made previously. It's longer and also with Blend Shapes in it. Sharp Tongue