This beautiful music is from the Japanese animiation "Pluto". A robot named the North No.2, who would like to learn playing piano with a famous composer, Sir Paul Duncan with this piece, in order to calm down his sorrow mindset after destroying tuns of robots in the war.
I transcribed this music and write the score and demonstrate the piano performance here. I think this piece of music is suitable for the piano students who get the ability of Grade 3 or above piano playing techniques.