Arc 4The Journey to R'lyeh
Haihara's entanglements with her students and her growing connection to the Witch unfolded alongside Dark Feather's rise and defeat by Silver Feather. The Witch took Dark Feather to R'lyeh in search of power, and they arrived at Black Forest.
- Haihara supported Shiori through weekend dates, and Shiori fought monsters as Wingless Bird before witnessing Dark Feather clash with Silver Feather.
- The Witch revealed herself to Dark Feather, subdued her, and offered her Magic Crystals in exchange for help defeating Silver Feather.
- Kuroki Yuka became Dark Feather and attacked a monster in a subway station, then fought Star Flower and Silver Feather on a moving train.
- Silver Feather transformed into Fate Kite and defeated Dark Feather, but the Witch rescued her and took her away.
- Haihara continued teaching and worried about her students, while Yuka recovered at home and swore revenge on the Witch.
- Shiori gave Ai a ticket for a trip to R'lyeh, and Dark Feather followed the Witch to Belial Station and boarded a train there.
- The Witch told Dark Feather that an Overlord's Magic Crystal might be in R'lyeh, and they arrived at Black Forest after sharing wine aboard the train.