This is the song that plays near the end of Darker than Black episode 25, when Hei… oh well, I don’t want to spoil it for anyone.
For more information about the track, refer to http://bit.ly/qCA2AL (bit.ly because YouTube’s automatic URL parsing is broken and refuses to see the closing parenthesis as part of the URL)
Couldn’t find it anywhere on YouTube, so here it is.
If you want to buy it, you’ll have to buy the Darker than Black blu-ray, or so I suppose.
All credit goes to the respective owners/copyright holders, yada yada, fair use, the usual story.
WACOCA: People, Life, Style.