Official Title	Letter Bee Light and Blue Night Fantasy
Alternative Titles	Tegami Bachi: Hikari to Ao no Gensou Yawa
Type	Special
Relation	Parent story: Letter Bee
Status	Finished Airing
Genres	Adventure, Fantasy, Slice of Life, Supernatural,
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Description

The story takes place in the land of Amber Ground, a place of perpetual night only partially illuminated by an artificial sun. Lag Seeing works as a “Letter Bee” (delivery boy) at the “Bee Hive” (a delivery service), with his Dingo, Niche, and her “pet”, Steak, traveling with him. He is entrusted with the “hearts” of the everyone in Amber Ground to deliver their packages.

(Source: Wikipedia)