Keiichi and his friends attend a game competition at a Sonozaki family owned shop. As a consolation prize for the event money, the store owner gives dolls to everyone except Mion. Keiichi gives his to Mion as he sees no value in keeping it. Later, Keiichi and his father meet at the cosplay restaurant. There, Keiichi meets Shion and confuses her for Mion, due to similar appearances. She proclaims that she is actually Mion's twin sister. Keiichi believes she is Mion pretending to be effeminate.

Rika has suddenly gone missing and Satoko coldly suspects Keiichi, who was the last one to talk with Rika, but Mion says that she saw Rika speaking with some men in construction uniforms. While looking for Rika, Mion pulls Keiichi away from a locked silo and indirectly informs Keiichi that Rika is trying to kill people and that she needs to put an end to string of murders occurring, which is being led by the Three Great Families.

After Satoko's panic attack, Keichi, the club, and the rest of the class are desperate to ensure her safety.

To save Satoko, the village of Hinamizawa unite in protest at the child consultation centre.

Rika receives a visit from Hanyuu and is told about an artefact, the holy sword Onigari-no-ryuuou.

A year after escaping near death, Rika reminisces about Hinamizawa; Satoko receives some surprising news; Rika decides she wants to go to St. Lucia Academy.

Satoko tries again by using Miyo, who now also retains memories from previous loops.

Satoko continues deceiving her friends and her uncle by posing as a victim of abuse.

Satoko stops attending school and continues convincing Teppei that she is being bullied by the village. Keiichi and the others begin protesting outside of Child Welfare Services. Wanting to protect Satoko, Teppei invites Oishi to the house to explain the situation.

After beating her uncle to death, Satoko showers to clean the blood off of herself and attends the festival with Rika and the others. During Rika's dance, Satoko lures Keiichi away and asks him to come to her house.

Eua overpowers Hanyu and forces her to watch Rika's death at the hands of Keiichi and Satoko in two separate fragments. While purchasing a present for Satoko's birthday in a new world, Rika begins to experience memories of being killed by Oishi.

Rika and Satoko begin to fight to the death across numerous loops.

Rika begins punching Satoko, telling her that she could never live in a world without her.