Kogane no Senritsu

Mai Takaoka, who has the ability to see the emotions and aura of a performer when she comes into contact with music, meets Kanade Kanzaki, a boy two years younger than her, at the home of her uncle Kazuma Ozawa, a famous pianist. When Kanade plays the piano for the first time, Mai senses Kanade's talent as a pianist. The two are drawn to each other despite their young age, but Mai leaves for London because of her father's work. At that time, Mai was in the sixth grade and Kanade was in the fourth grade.
Three years later, Mai returns to Japan and meets Kana again at Kazuma's house. The two have grown up and are more strongly attracted to each other than ever before.

(google translated)