A Brighter Blue Than That Before the Dawn), also known as Crescent Love, is a Japanese adult visual novel developed by August and first released on September 22, 2005, for Windows.

A 12-episode anime adaptation titled Yoake Mae yori Ruriiro na: Crescent Love aired in Japan between October and December 2006.

Its gameplay requires little player interaction as much of the game's duration is spent on reading the text that appears on the screen, which represents the story's narrative and dialogue.

Yoake Mae yori Ruriiro na centers on Princess Feena Fam Earthlight from the Kingdom of Sphere on Earth's moon.

The background of the story explains that humans landed on the Moon long ago intending to create a new home for themselves called the Kingdom of Sphere.

Once the war was over, it was decided that the city of Mitsurugasaki in Shizuoka Prefecture of Japan, where the story takes place, under the rule of the United Nations, be developed as the center of diplomacy with the Lunar Kingdom, which, currently, has closed its doors to the world.

[1] Aria and HuneX released a PlayStation 2 (PS2) port titled Yoake Mae yori Ruriiro na: Brighter than dawning blue on December 7, 2006, which removed the adult elements of the game and introduced two additional heroines.

[2] The PS2 version was later ported back to Windows titled Yoake Mae yori Ruriiro na: Brighter than dawning blue for PC on September 18, 2009.

A set of six drama CDs were created based on the video game Yoake Mae yori Ruriiro na -Brighter than dawning blue-, entitled Yoake Mae Yori Ruriiro na ~Fairy tale of Luna~ #1-6 (夜明け前より瑠璃色な〜Fairy tale of Luna〜 #1-6) released between April 21, 2006, and September 22, 2006, at roughly one-month intervals by Marine Entertainment.

A light novel titled Yoake Mae yori Ruriiro: Lavender Eyes, written by Saya Amō and illustrated by Bekkankō, was published on December 20, 2006.