Day 1 - Tuesday, the 16th: Mabayu mulls over Kyubey's words and is greeted by Mami on the way to school. Later, she suggests they ask for Mami's help, but Homura rejects the idea, so Mabayu suggests they reach out to Kyoko instead.
Kyubey informs Mami that Mabayu is an "irregular" Magical Girl, like Homura Akemi. Homura later explains to Mami that Mabayu erased her memories due to her future vision.
Mami meets Homura, who explains that Mabayu erased memories of Mami to protect her future. The two engage in a battle, but Homura wins and Mami agrees to hunt Witches outside of Mitakihara.
Day 5 - Saturday, the 20th: Homura and Mabayu introduce themselves to Kyoko, tell her about their powers and inform her about Walpurgisnacht. Kyoko agrees to a temporary truce.
Day 6 - Sunday, the 21st: Mabayu helps Kyoko defeat a Witch. Later, at the arcade, Homura, Kyoko and Mabayu agree to gather military arms and more Grief Seeds, and ask Kyoko to start working at Récompense.
Day 7 - Monday, the 22nd: Kyoko starts working with Mabayu at the café.
Mami defeats Rebecca and returns to Mitakihara for the night. She sees Mabayu working at the café and unexpectedly finds Kyoko there too. Mami warns Kyoko telepathically, and they agree to exchange information about Mabayu and Homura.
Day 11 - Friday, the 26th: Sayaka starts working with Kyoko and Mabayu at the café.
Day 15 - Tuesday, the 30th: Kyoko and Mabayu easily defeat Charlotte.
Day 16 - Wednesday, the 31st: Mabayu decides to show Kyoko her power of cutting memories, and takes her along when she cuts Sayaka's memories of Kyosuke's breakdown.
Later, Kyoko warns Mami about the possibility of Magical Girls turning into Witches and suggests she ask Kyubey for answers.
Day 17 - Thursday, the 1st: Mabayu defeats an Anja and is approached by Mami, who says she can't trust Homura and urges Mabayu to come with her. Homura intervenes, freezing time, but Mami's attached a ribbon to Mabayu and is not frozen in time. Mabayu stops Mami from attacking Homura by cutting the ribbon. Kyoko is interrupted from working by Homura's call and, back at Homura's place, learns that Mami might soon become a Witch. Homura orders Mabayu to stay put, but Mabayu sees Kyoko's future and rushes off.
Mabayu meets Mami at the train station and she asks Mabayu to leave town with her to escape Homura's control. Mabayu warns Mami about using magic recklessly, as she could turn into a Witch. Mabayu prepares to cut Mami's memories and sees herself in them, moments with Mami that she hadn't known about. She sees herself meeting Mami and learning about Magical Girls. In the memory, Mabayu learns of her wish, her time with Mami and recruiting other Magical Girls. Then she sees Mami's perspective from this timeline of Mabayu having forgotten about her and of Homura's actions.
Kyoko catches up to them and accuses her of wiping Mami's memories but Mabayu runs off. She walks the streets and feels guilty of encouraging other girls to make contracts and then erasing their memories. In the pendulum room, Homura offers her a Grief Seed, but Mabayu refuses and sees Homura's future. Mabayu lies and says that they'll stop Mami's rampage and defeat Walpurgisnacht. Kyubey appears, but Homura shoots him and they split up to go search for Mami. Kyubey finds Mabayu by the riverside and she reveals she saw a future where she becomes a Witch, destroying the town with Mami. Afterwards, her prediction said she'd turn into a Witch after she woke up in the next loop and that there'd be no more loops afterwards. He argues it's her fate, but Madoka interrupts and declares that Mabayu deserves salvation. Madoka wishes to save her from despair and becomes a Magical Girl.
Mabayu remembers her original timeline where she saw Homura and died fighting Walpurgisnacht. She also sees a prediction of a future timeline where Madoka saves Magical Girls by becoming Ultimate Madoka.
Breaking away from the visions, Mabayu reassures Madoka and declares that Kyubey's plan to use Mabayu to manipulate Homura will not work. Homura calls to Mabayu telepathically and informs her Mami's at school. They meet, Homura sees Madoka is a Magical Girl and Mabayu apologizes for her earlier lies. They all agree to save Mami from becoming a Witch and Kyoko shows up as well to help them and tells Mabayu she doesn't blame her for earlier. The girls find Mami in a classroom and when Homura tries to stop time, she realizes Mami has covered the floor with ribbons to counter her. Mami ensnares Mabayu with ribbons and vows to break her supposed brainwashing. Madoka frees Mabayu with her arrows and Mami attacks, admitting she only ever wanted to protect everyone. Mabayu approaches Mami and her team protect her from Mami's attacks. She reassures Mami that even if her memory is gone, their bond will remain, and there's hope for all Magical Girls. Mami asks if they're friends, and Mabayu nods that they will always be friends and cuts Mami's memories.
Day 32 - Friday, the 16th: In Homura's pendulum room, the group prepares for Walpurgisnacht. Homura notes that they were able to steal weapons from military bases and set them around the city, though only 70% of their original goal was met. Mabayu reads the future and adjusts the plan slightly and they head off. Mabayu affirms to the others that they'll succeed but after everything, Walpurgisnacht is undefeated. Mabayu apologizes to Homura, who knew the prediction was a lie. Homura bids Madoka goodbye, turns her shield, and resets time as her hourglass runs out.
