I've been thinking about making a wallpaper challenge about this song (It'll be below). Saihate (Furthest End) is a song about a person (Miku) having a person close to them die, and wonder what it would be like on the other side. They eventually move on for the better, even though it's sad and painful.
Here's the song:

Here's the lyrics, if you want.
But there's this: