Season 1

Keiichi spends his day accompanying his friends. He, Mion and Rena are on a tour to the village. Afterwards, he retrieves the statue of a fast food restaurant mascot because Rena finds it 'cute'.

Keiichi goes with Rena to retrieve the Colonel so she can take him home with her. Later, Keiichi and his friends have fun at the festival and watch Rika performing the ritual.

Hinamizawa's darkest secrets begin to unfold as Keiichi talks with the local detective.

Keiichi grows more suspicious of Rena. The next day at school, Rika encourages Keiichi to be brave. Keiichi feels guilty and tries to return to normal life. That same evening, his parents leave town for the night, leaving him alone, and Rena wants to come over to cook dinner for him.

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.

Inside the sacred shed Keiichi learns about the dark origins of the Hinamizawa village and the Festival. The day after he finds out that Miyo, Jiro, and the village mayor have gone missing.

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.

Keiichi makes a bet to the club that he can cook better than Satoko. The same night, he attempts to fry some vegetables but nearly burns down his own house. Rika and Satoko arrive to put out the fire and Satoko prepares her own dish. Rika explains to Keiichi that Satoko is taking a liking to cooking for him since it reminds her of when her older brother, Satoshi, used to wait for her meals.

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.

Following Keiichi's lead, everyone head to the child guidance centre to try and save Satoko.

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.

Mysterious goings-on disrupt life in a small town.

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

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.

Rika tells Satoko about a dream she's been keeping secret for a long time; Satoko is confused.

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

Mysterious goings-on have disrupted life in a small town.

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.

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