From Yen Press:

You’ve already met Keiichi Maebara and his mischievous friends in the Abducted by Demons Arc. But Oyashiro-sama’s curse is poised to strike anew in Hinamizawa village. When Keiichi spots tomboy Mion working at a maid café, he can hardly believe his eyes! But it’s not Mion after all — it’s her identical twin sister, Shion. Keiichi’s never heard of this “twin sister” before and suspects it’s just another one of Mion’s pranks. But through Shion, Keiichi is able to see a quieter, more feminine side of his best friend, even if it is all an act. As Keiichi spends more time with Shion, however, Rena grows more accusatory…

The story of Higurashi no Naku Koro ni is divided into a total of eight chapters: four "Question" arcs and four "Answer" arcs. Each chapter keeps the same main characters, but ends in a different way. However, each chapter gives valuable answers, hints, and clues to the previous one, while at the same time bringing forth even more mysteries.

The question arcs are:
1. Higurashi no Naku Koro ni - Onikakushi Hen
2. Higurashi no Naku Koro ni - Watanagashi Hen
3. Higurashi no Naku Koro ni - Tatarigoroshi Hen
4. Higurashi no Naku Koro ni - Himatsubushi Hen

The answer arcs are:
5. Higurashi no Naku Koro ni Kai - Meakashi Hen
6. Higurashi no Naku Koro ni Kai - Tsumihoroboshi Hen
7. Higurashi no Naku Koro ni Kai - Minagoroshi Hen
8. Higurashi no Naku Koro ni Kai - Matsuribayashi Hen

The side story arcs are:
- Higurashi no Naku Koro ni - Onisarashi Hen
- Higurashi no Naku Koro ni - Yoigoshi Hen
- Higurashi no Naku Koro ni - Kataribanashi Hen
- Higurashi no Naku Koro ni Kai - Utsutsukowashi Hen
- Higurashi no Naku Koro ni - Kokoro Iyashi Hen
- Higurashi no Naku Koro ni - Hirukowashi Hen
- Higurashi no Naku Koro ni Jan - Tsubamegaeshi Hen
- Higurashi no Naku Koro ni Rei - Saikoroshi Hen