https://www.loverslab.com/topic/231517-mods-for-heroine-rumble-2-hr2-by-enlit3d/ and in discord mod releases channel: https://discord.com/invite/7VrthNa
Size Difference of +1 means that the grab only works on enemy that is one Size Category larger. Size Difference of -1 means that the grab only works on enemy that is one Size Category smaller.