This the theme of Kuro's father, Jurai.
He's the most awesome guy in the world, who dissapeared years ago in his battle with Kaiden, wherein he teleported himself and Kaiden elsewhere to try and save Kuro, who then fled to earth.
For an idea of how awesome he was, just check out the Thousand Master, Nagi, from Negima! Who is possibly the coolest dad ever.
Jurai's a really special character, so his theme is longer than most I have done before.
GODDAMNIT I LOVE THIS GUY.