This is a pretty spot on and in full remake of the opening music of Bokurano. The song is titled Uninstall by the artist Ishikawa Chiaki. Bokurano is a manga with an anime adaptation of twelve children who deal with life while deciding to give up their lives to save their world. This may seem like your average Evangelion like anime, but brings forth some intense moments. Don’t Wikipedia this anime for details or it’ll ruin everything.