A commission! That light that appears around Rukia’s cocktip at the end is supposed to be the Bakudo #61, Rikujōkōrō keeping her on the pleasurable edge of orgasm just a moment longer.
It doesn’t quite look like the magic in the anime. I tried using neon lights instead, but they had annoying electronic bits attached that I couldn’t turn invisible.
90mb: https://loli.temel.me/iQyc2Jkl0QoqNODwa7ZOQ2qEa9DRJrNX.mp4
Gfy: https://gfycat.com/UnhealthyFlakyIbisbill