Another KOTOKO song; this one’s a little more intense than usual for her.
“Suppuration ~core~” was used in episode 5 of Kannazuki no Miko, for the fight between Souma and Tsubasa. (Though it is arguably even more applicable to Chikane and Himeko’s situation in episode 11, so it may be considered a bit of foreshadowing.)
The song with lyrics:
(uploaded by Channel ni heart 9856)
And a KnM AMV:
(uploaded by 09melody09)