Episode 179

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

Summary
Miroku and Sango have vowed to marry once Naraku has been defeated. However, this time how far they are willing to go to protect each other will be tested.

Plot
Coming across a corpse that is lacking it's bones, the group decides to investigate. As it's the night of the new moon, Sango and Miroku are left to find out what happened as Inuyasha is stuck as a mortal until sunrise. The two soon discover the perpitraitor is the daughter of a Bone Demon, who has been collecting bones to heal her father. Trying to cut the Bone Demon's skull in half with Hiraikotsu, Sango finds the demon finds it tastey and perfect for healing himself. Still in his human form, Inuyasha 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 a corrosive poison on Hiraikotsu and hurls it at the demon, as he eats it, it begins to kill him. Inuyasha arrives, his half demon powers intact, and uses the Adamant Barrage to finish off the demonic daughter. Hiraikotsu is destroyed, but Myōga tells Sango there is a sage nearby who can fix it; Totosai cannot help with this as if he reforged it, Hiraikotsu would only be shell of its former self due to the poison weakening it.

The group visits the drunken Master of Potions in the mountains, he puts Hirarikostu in a pot of poison, which starts disolving it, and tells Sango to get in the other to quell the demons inside of it to make the poison medicene. Once inside, Sango comes face to face with the demons whose bones were used to make Hiraikotsu; they're angry with her for coating them with poison, thinking they had bonded over all the years they had been together. Sango asks them to fight with her again, but they say they will only if she promises not to betray them again. However, Sango says she cannot make a false oath as she would most likely betray them again to save Miroku, angering them.

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.