Based on the second trailer, the first arc will be an answer arc to Onidamashi-hen, with Mamiya Rina making her appearance in the sequel series. Sotsu continues the story of Higurashi no Naku Koro ni Gou, following Satoko Houjou as she attempts to stop Rika Furude from leaving Hinamizawa.

Tohru learns about a new Maid Café had opened nearby and decides to work there during her free time. Kobayashi and Kanna drop later at the café to check on her just to find that she has become their cook. Tohru uses dark magic to enchant the dishes served there, which makes the café a success, until she decides to quit, but before leaving, she teaches the other maids to use dark magic as well. A few days later, Tohru and Kobayashi are attacked by Ilulu, an extremist from the Chaos Faction who berates Tohru for coexisting with humans. Tohru gets herself in a disadvantage against Ilulu as she protects the city from her attacks until Kobayashi enlists Elma's help by bribing her with sweets, allowing Tohru to fight with all her power and defeat Ilulu. Ilulu later returns and attempts to seduce Kobayashi but fails. Certain that Kobayashi has not fallen for her because she's a woman, Ilulu retreats for a while, but not before transforming Kobayashi into a male.

In 3 short scenes with chibi-versions of Sora, Layla, May and others you'll find out how to cook, how to play with diabolo and learn some words from seal language. (Source: ANN)

Let not an Outsider touch thee, Lest thou shalt be cursed forever. Once upon a time, in a land far away that was divided into two realms... The Outside was roamed by teratomorphic creatures who had the power to curse whoever they touched. Humans could live safely only in the Inside. But when a lost little girl from the Inside named Shiva, and a demonic beast-looking Outsider simply known as "Teacher" initiate a quiet coexistence on the same side of the forest, their bond seems to transcend their incompatible natures. It is the beginning of a folktale about two outcasts -one human, one inhuman- who linger in the hazy twilight that separates night from day. (Source: Production I.G)