Towa, Setsuna, and Moroha accept a demon-slaying request from a mysterious man.
Sesshomaru hands the broken Tenseiga to a grieving Towa, leaving Setsuna's fate in her hands. Will Towa be able to bring Setsuna back to life?
Towa learns about a demon that targets women with long, beautiful hair. Meanwhile, Moroha and Setsuna help a nun who isn't exactly what she seems…
Jaken recalls that fateful day fourteen years ago when Zero placed a curse on Rin. The three girls search for Bokusen-Oh.
The three girls arrive at Mount Musubi but are trapped by a powerful barrier. Moroha manages to escape and runs into something unexpected.
Trapped within Mount Musubi, Rion's soul longs for peace. Rion asks Setsuna to sever the thread of fate connects her to her father, Kirinmaru.
Setsuna is kidnapped by Princess Aiya, daughter of the deputy shogun, who begs Setsuna to be her body double for a day so she can escape her studies.
Takechiyo hires Moroha to help him with the familial strife at his home. Kohaku teaches Towa an important lesson about learning to run away.
Zero sets a trap in the garden of Nanahoshi, a demon who feeds on sadness. Kohaku, Hisui, and Setsuna assist the demon slayers in the north.
The demon slayers struggle to put out the fires caused by the Flame Bulls. Mayonaka demands the villagers hand over the town's divine object.
Moroha learns about the Full Moon Raccoon Dog and Takechiyo's exile. The snow demon Yukinyudo attacks Setsuna. Zero targets Towa on the new moon.
Moroha and Takechiyo strike back against Shogen Mamiana. Setsuna experiences her first New Moon. Towa is trapped by Nanahoshi's eternity bugs.
Zero unearths Towa's sadness and loneliness. Sesshomaru appears before the demon slayers and commands Setsuna to pay the Tree of Ages a visit.
Setsuna stops Towa from killing Zero. Rin's curse cannot be lifted unless Zero lets go of her regrets. Sesshomaru gives Moroha the Black Pearl.
Kirinmaru takes the Black Pearl from Moroha. Towa, Setsuna, and Sesshomaru arrive at the scene. Meanwhile, Rion and Riku head to Mount Musubi.
Moroha is finally reunited with her parents. Inuyasha sees a way out of the Black Pearl. Kirinmaru's attack leaves Sesshomaru gravely injured.
Kirinmaru faces off against Sesshomaru. Towa summons the Tenseiga. Shippo waits for Inuyasha and the others at Gozu and Mezu's gate.
Osamu Kirin sees the Grim Comet approaching, and the Spirit of the Tree of Ages orders the half-demon princesses to go destroy it.
To destroy the Grim Comet, Towa, Moroha, and Setsuna must travel through the Windmill of Time, but Meidomaru stands in their way.
When Towa, Setsuna, and Moroha arrive in the present day, Osamu Kirin asks the girls to slay demons at a concert that is happening that night.
Evil spirits are pouring out of the burning Windmill of Time. The three girls and Osamu Kirin try to stop the Grim Comet from falling to the earth.
Osamu Kirin brings the Grim Comet to the feudal era. The girls are stuck in the present day.
Towa, Setsuna, and Moroha must save Rion, who has linked her fate with the Grim Butterfly.
As the girls continue to sever Rion's threads of fate, more of Rion's true feelings are revealed.