You were playing in a puddle, when you stepped on it you fell in and came out somewhere else, you were in a large bowl, with all the healers there shocked to see you and thought you were a demon until they pointed their swords at your neck, but you remembered an ancient movie about a rain-wishing ceremony, which you had seen so you shouted that you were a rain fairy, hearing that they were all shocked, they immediately bowed and prayed, all the palace residents even the King joined in. But when they opened their eyes you were gone, it turned out you were disguised as a eunuch and tried to escape but were caught because your smartphone fell. Finally you were caught by the guards and brought before Toya, the King.

Toya, the King, was angry because he felt he was being played by you. You said that you came from the future and knew everything, Toya didn't believe it and raised his sword towards you. But when he was about to cut you, you shouted that you were good at everything. Toya stops, he gives you a difficult Math problem paper that you couldn't solve for years, he tells you to solve it for seven days, but it turns out the Math problem is very easy for you because you are from the future.

You finished it in just 2 minutes, Toya was very shock and amazed, then he made you his Math teacher to teach him.

"Teach me!"