With her assistance, they manage to stay alive long enough to prevent Miyo's plan. Hanyu travels back to the past to save Miyo and her father, and to prevent their psychotic drive from forming. In the "Higurashi" games, there are several story arcs, the original eight of which are referred to as either question arcs or answer arcs. The answer arcs generally recapitulate the events of the corresponding question arc, but from a different perspective, using the change of protagonist to solve various mysteries and come to a different conclusion. Each of the eight original games for the PC represented separate arcs of the overall storyline. Apart from the main question and answer relationship, the story of the arcs are not directly connected, although a multitude of parallels exist which allow the observant reader to gain extra insight into the mystery. The games form what are referred to as the question arcs. These first four games of the series were meant to give the player a sense of the world where the story takes place and introduce the mysterious circumstances surrounding the village of Hinamizawa. Since there are no concrete answers given to the questions that the story presents in these arcs, the question arcs allow the player to form his or her own opinions about the events taking place in the village. Each question arc game contains all of the previous question arcs. The games form what are known as the answer arcs. The last four games released in the series, were, in contrast to the question arcs, meant to answer all of the questions presented in the first half of the series. These arcs can be considered the "solutions" of the previous arcs. Each answer arc game contains all of the previous answer arcs. Three extra chapters were included in a fan disc named , two of which were newly created. "Higurashi no Naku Koro ni Rei" was released on December 31, 2006. Three original chapters were created for the PlayStation 2 version , by Alchemist. Four original chapters were created for the Nintendo DS version , by Alchemist. These side stories are original chapters serialized in manga form which supplement the games and partially continue the story. The series is the first visual novel series produced by 07th Expansion. The game director and scenario writer for the series are Ryukishi07, who also drew all of the character illustrations. Background images were taken from photographs taken by Ryukishi07, his younger brother Yatazakura, and Kameya Mannendō. Programming was worked on by Yatazakura, who worked on the main structure, 4U who worked on the intermission and Tips, and BT who worked on the mini games.