The following is a piece of pure music that suits your requirements:

Title: "Eyes on Me"

Composer: Joe Hisaishi

Album: "One Summer's Day"

The first half of this piece of pure music has a slower tempo and a simple and beautiful melody, suitable for relaxing or meditating. As the music progresses, the rhythm gradually speeds up, giving people a gradually rising feeling. In the middle of the music, there will be a rhythm change, which makes the music more vivid and interesting. The whole song has a smooth melody and is perfect for relaxing or enjoying with friends.

Hope you like this pure music!