Found a recording of the full version of Lion being sung live by May’n and Megumi on Youtube. The quality is kinda terrible, but you’ve gotta live with what you can get I guess.
The live version is actually quite interesting because Megumi uses a lower voice to sing, not her Ranka one. I guess it’s hard to keep up the Ranka voice and perform live.
I still can’t stop looping Lion myself, I think I’ve already rewatched the whole OP sequence at least 20 times since yesterday. I gotta love the lyrics, they give off a strong feeling of “I will survive” for me.