Do you know the artist that plays on ひとつのハートで?

What chords are in ひとつのハートで?

What is the BPM of 三重野瞳 - ひとつのハートで?

Which chords are part of the key in which 三重野瞳 plays ひとつのハートで?

In which year did 三重野瞳 release ひとつのハートで?