It's little yan, and she's back. She asks why they're back, and zhu tells her that they want to live a "good life" disguised as a "human" . Little yan wants to know why they came back, but zhu doesn't want to tell her what they've been up to. They're going to stick to their original plan to get the serum, but what about the failed test subjects ? They'll have to fight them, but they don't have a choice. They just have to hold the failed subjects back until they get to the school. .