It's been a long time since the students of class 6-3 have seen each other, and now they're all back at school, studying at an orange high school in Shanghai. One of the students, han, has a special wish: he wants to see the meteor shower that's supposed to happen once every 33 years. He keeps a diary of the last time he saw the shower, on the 20 th of June, 2000 . He says that the switch demon hates him because it sees the true colors of the sky when no one is around. He calls it "the switch demon" because he's afraid that it'll grab his head and twist his ears. He's also afraid that he'll commit suicide if he sees the shower. He doesn't want his best friend, mumu, to worry about it, because he wants her to be able to die with a meteor shower.