requirement
Tempest MAx's OSR2+
https://www.patreon.com/tempestvr

BepInEx 5.4(https://github.com/BepInEx/BepInEx/releases)
KKSAPI_v1.35(https://github.com/IllusionMods/IllusionModdingAPI)
KKS_BepisPlugins(https://github.com/bbepis/BepisPlugins/releases)

NodesConstraints

Installation
Extract the plugin .zip file to your game folder.

V1.1.0 no longer requires a cylinder.
usage

1. load the character.
   
2. Assign your favorite poses and motions.
   
3. Open the anim-kinema-IK tab, press "Refer anime position" and turn on IK.
   
4. In the OSR2 Link window, press the Sync Character button, then press the AutoMove button.
   If you want to change the animation, start over from number 2.
   (Up to 9 characters can be selected, but,HS2 version only main character)
   

However, the cylinder mode is retained as it allows for finer adjustments.

"KKS_OSR2LinkST" This is a plug-in that works with Koikatsu Sunshine's CharaStudio. KKS_OSR2LinkST gets the motion of a "cylinder" object placed in the scene. At the same time, it synchronizes the OSR2 device with the movement of the "cylinder".

His NodesConstraints plugin by another author is practically mandatory. Use NodesConstraints to pair cylinders with character IK etc. You can synchronize the up-and-down movement and swing movement that is poured into the character with the movement of OSR2.

Looking ahead, I'm not sure it's possible. I'm thinking of a function to send the movement of the character to OSR2. If I can do that, I feel like I can use it in the mainGame.