

The club members in Okinomiya plan to cross the river before dawn to make it to the Sonozaki Family Office. Rika thinks back on Takano's statement and surmises that this calamity is a result of a conflict in the world of gods. Hanyū explains that Tamura and her clan were indigenous to this region before Hanyū's clan arrived and were refused as invaders. She blames Hanyū and her brethren for the calamity and admonishes them as foul impurities before taking her leave.

Tamura reprimands Hanyū and shows her an image of the present-day Okinomiya, overcome with frenzy and violence. Hanyū takes Rika to see Tamurahime no Mikoto, her old adversary whom she believes has a role to play in this calamity. Rika wonders if the "devil" Takano mentioned was a god like Hanyū. Tomitake, Rika and Hanyū head to Okinomiya in order to stop Takano. She explained to him how she would cause an outbreak as a messenger of god and save the human race from the "devil". He reveals that he was kept imprisoned there by Takano Miyo, who told him she intended to spread the Hinamizawa Syndrome across the entire world via the strain η-173. As they explore the Irie Institution's basement, they discover Tomitake Jirō locked up in the storage warehouse. Meanwhile, Rika and Hanyū head to the Irie Clinic which had been attacked and abandoned earlier. They are miraculously rescued by a young girl named Une and they take refuge with her from the mob. Soon, the club members are chased by one of the deranged vigilante mobs who seek to destroy the "infected". They discover the city wrapped up in chaos and learn that it might even be more dangerous than Hinamizawa, due to the abundance of the younger and more virile population. They decide to go to the Sonozaki Family Office there to find aid and medical care. The club members head to Okinomiya-excluding Rika, who stays back.
