As the group whose members were mostly high-ranked, Jiji's group would be the one to release the finale curtain.
Before that though, Iris's group would perform first.
They were the third group to choose a song and they ended up selecting Undead.
Message aside, Rayen liked this song more than Resurrect Me because it was easier to sing with its lower keys. Also, Rayen already had an idea for the concept of this song. It's obvious.
Zombies.
And just as expected, Iris really did zombify themselves.
If not for this song, Rayen would have also suggested a zombie concept for their own performance. That's why he had a bit of a hard time coming up of a different concept — he was trying to avoid a possible overlap with the other team.
Thankfully, it worked out.
"I've always wondered what's in your mind
For your sake, why are they crying?
Tell me what you're hiding behind