Episode 179

 Sango's Feelings, Miroku's Resolve is 12th episode of InuYasha: The Final Act.

Plot
Sango and Miroku battle against a Bone Demon and his daughter. The Bone Demon has been injured and seeks Sango's Hiraikotsu in order to strengthen himself. Inuyasha is a human due to the influence of the new moon, and is rushing to his friends aid with Kagome and Kirara. The demon attacks using skeletons of his victims, and Miroku is forced to use his Wind Tunnel to absorb them. The skeletons are covered in a weak poison though, which aggravates his injury. Both he and Sango are swallowed up by the demon, and Miroku is forced once more to use his Wind Tunnel before passing out. With no escape left, Sango pours poison on Hiraikotsu and hurls it at the demon, as he eats it, it begins to kill him. Inuyasha arrives, transformed once more and uses the Kongosoha to finish off the demonic daughter. Hiraikotsu is destroyed, but Myoga tells Sango there is a sage nearby who can fix it. The group visits the drunken sage in the mountains, and Sango is forced to battle the numerous demon's whose bones were used to create Hiraikotsu. The demons confront Sango, asking why she poisoned them after they had been with her through so many battles. Meanwhile, the Sage confronts Miroku about his own poisoning, offering up an antidote that will eradicate all feelings of pain associated with the Wind Tunnel sucking up poison, however it will do nothing to treat his injuries. Miroku agrees and drinks the potion, passing out in pain. The demons that confront Sango feel Miroku's resolve to live and protect her and agree with her decision to protect him as well. Transforming into skeletons and then back into Hiraikotsu itself, Sango emerges from the jug with her boomerang intact. Thanking the Sage for restoring Hiraikotsu to its original form, the demon sage comments that it has actually transformed, but she would not learn the truth of its transformation until she uses the Hiraikotsu in battle.