This song سے طرف کی Hatsune Miku is about comparing a lost love to the moon; how they are 'in sight' but oh so far away. It seems melancholic, but listening to it makes me feel peaceful. ;u; Corny as this sounds, I like to listen to this when it rains, یا when I'm in a city at night (it just kind of has that urban sound to it) یا when I'm just pensive and looking out a window.
If you're looking for piano music, try listening to pieces سے طرف کی the piano player Yiruma. Some of my fav songs from him are 'Sometimes...Someone', 'Indigo', and 'The Yellow Room'.
Upbeat rain-themed songs!~ 'Rainy Reincarnation' سے طرف کی Hatsune Miku!~