Everyone is looking at the distant planets that are visible in the sky, along with some moons. They just finished talking about Ke Li, and they decided not to tell Mu An about who Ke Li really is. In Shou Ji's words, children should always be innocent, and so they would let Mu An keep his impression of Ke Li – and so is the friendship between them. Even if they are grim reapers, but they were never a villain – not that they are heroes, either. So, they won't be the villain who will make Mu An realize who Ke Li truly is.
Just as Shou Ji, Jiu Ye, and Mu An were chatting with Mu An inquiring about the world where they came from, they saw some flashing lights in the sky that are fast approaching.