The Star Trails of the Unknown

When the end of the world and midterm exams fall on the same day, which one do you choose? "Choose the end of the world." "Why?" "Because there are no exams." ——This was the first reaction of the trio after they learned that they were going to save the world. It's a pity that the system does not allow returns. 12 Fragments of time and space are scattered in the racing track, library, and even the spicy bar bag in the school canteen. The prince from another world said: "Come with me and I will keep your glory and wealth." The trio didn't even look back: "Will you help me with my homework?" The prince was silent for three seconds: "... I will help you fight the villain." "Deal!"