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.

Keiichi learns about the yearly murders from Shion, Miyo, and Jiro. At the festival, Shion drags Keiichi away from Rika's dance and the two run into Miyo and Jiro, who are breaking into the ritual tool shed. They decide to go inside to look at it with Miyo.

Keiichi learns more about Satoko's painful past, which causes him to care for her even more.

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.

Rika makes a decision; Rika and the club members visit a toy store in Okinomiya.

Rika arrives in a world without tragedy, where she is free from Oyashiro-sama's curse.

Rika gets the life she's longed for at St Lucia Academy, but Satoko struggles.

Satoko no longer wants to suffer, and begins a lonely battle to realize her own dream.

Satoko finds out that some non-looping people retain a fragment of memory from the loops she lived through. One of those people is her uncle Teppei.

After witnessing Keiichi speaking with Oishi outside of school, Rena becomes convinced that Keiichi knows about her crime.

After watching Rika express her continued resolve to escape her fate to Hanyu in the Sea of Fragments, Satoko awakens alongside Rika in a new world. In need of a more reliable murder weapon, Satoko manipulates Teppei into giving her the contact information for an arms dealer.