The tail is from @dantethedarkprince's Bunny Suit and the ears are from @Ah P's Shimakaze Dynamic Hair.
The tail is a panties mod, RGB1 adjustable and the ears are headwear, RGB1 and 2 adjustable.
The tail may have problems if you don't use Thicker Ass And Legs.
Based on @RajasGrime's 'Bunny Ears Hairband' mod, this mod makes it RGB adjustable. This one was also amazingly easy to make RGB adjustable though I did have to make a few more touches on this than his 'Demon Horns' mod.