Darker than Black: Kuro no Keiyakusha - Sakura no Hana no Mankai no Shita
English name: Darker Than Black Episode 26: Beneath the Fully Bloomed Cherry Blossoms
Genres: Comedy, Sci-Fi
Type: Special, Episodes: 1
Aired: Mar 26, 2008
Studio: Bones
Source: Original
Rating: R - 17+ (violence & profanity)
Synopsis:
A side-story of Darker than Black, also called Episode 26, that takes place during the events of Kuro no Keiyakusha. 

The Syndicate has another job for Hei and his team. This assignment involves the sought after possessions of a dead contractor, which are believed to have been buried beneath a cherry tree. Meanwhile, Misaki Kirihara and her team plan a trip to the Cherry Blossom festival.