Tsubasa: Shunraiki
English name: Tsubasa RESERVoir CHRoNiCLE: Spring Thunder Chronicle
Genres: Action, Adventure, Drama, Fantasy, Romance
Type: OVA, Episodes: 2
Aired: Mar 17, 2009 to May 15, 2009
Studio: Production I.G
Source: Unknown
Rating: R - 17+ (violence & profanity)
Synopsis:
Tsubasa/xxxHOLiC Project

A 4 part OVA released with the limited editions of the Tsubasa and xxxHOLiC volumes.
There are two OVAs for each series, with plots linked together.

They cover the Nihon Country Arc and scarcely some of the Celes Country Arc.

(Source: Official Project Website)