This work is a full remake of the second title in the "Zero" series released in 2003, "Zero Crimson Butterfly," a Japanese style horror adventure game in which twin sisters who stray into an abandoned village haunted by vengeful spirits advance the story while fighting the spirits using the camera "Camera Obscura" that captures the impossible and seals it away. In the story, the twin sisters Mio Amakura and Mayu Amakura visit a stream of memories that is soon to be submerged by a dam. While Mio is lost in memories, her elder sister Mayu is lured by a red butterfly into a "village erased from the map." It is a village where night never ends, swarming with vengeful spirits searching for twins who escaped from a ritual. Mio tries to find Mayu and escape the village, but that act unintentionally traces a past tragedy, and Mio learns the truth of a "forbidden ritual you must not see" in the innermost part of the village. The characters are Mio Amakura, voiced by Yui Kondo, and Mayu Amakura, voiced by Haruka Shiraishi. All elements such as graphics, sound, and operability are updated, and the stage "Minakami Village" is realistically expressed with a dark and eerie atmosphere through strong emphasis on the depiction of light and shadow. With three dimensional sound, you feel the presence of spirits more closely and enjoy a real horror experience exploring the village swarming with vengeful spirits. The new function "hold hands with Mayu" allows you to recover health and spirit power, and when Mayu is in a pinch she may fall, so approach her and help her up. Holding hands deepens the sense of the sisters' bond within the story. New elements in the "Camera Obscura" include "focus," "zoom," and "filter," which deepen the play in both exploration and combat. [Premium Box contents] a game software, an official setting materials collection with a newly written novel "Minakamimura Hisai Roku / Yakusoku no Kieta Mori," a set of five phosphorescent postcards where blood and spirits glow, and a butterfly shaped acrylic key holder of Mio and Mayu. [Number of players: one] [Supported languages: Japanese, English, French, Italian, German, Spanish, Chinese traditional and simplified, Korean] [CERO age rating: for ages 17 and up]. *The Windows version includes a Steam CD key, and no package or disc is included.