Vampire Hunter Gaiden: Lei-Lei Hen - Owaranai Haru (ヴァンパイアハンター外伝 レイレイ編 終わらない春), translated as Vampire Hunter Tale: Hsien-Ko - Endless Spring is a light novel based on Night Warriors: Darkstalkers' Revenge. The novel was written by Akihiko Ureshino (嬉野秋彦) with illustrations by Kohime Ose (桜瀬琥姫). The book was published on 1996-01-01 under the Gamest Z Bunko (ゲーメストZ文庫) label by Shinseisha.
The focus of the story is on Hsien-Ko and Mei-Ling.