Honkai: Star Rail - A Flash is a oNA (web) anime, produced by Fantasier Animation.

About the production: the story comes from a video game, there is 1 episode of about 5 minutes and its current status is "finished".

Its main genres are action, fantasy and sci-fi, with themes such as Advertisement.

On AniList, Honkai: Star Rail - A Flash has an average score of 76%, a very good score, and appears on 1,950 users' lists.

Year 7380 Star Calendar, Jingliu, the mara-stricken swordmaster of the Luofu, slashed her way out of Starskiff Haven, cutting through the Cloud Knights tasked to subdue her before vanishing in the mist of history. Year 8096 Star Calendar, a young soldier named Yanqing rose to fame from the tournament hosted by the Seat of Divine Foresight, and was conferred the rank of Cloud Knight Lieutenant. "The years pass in a flash, cups of wine the only solace." A fleeting flash — thus is the speed of swift blades as the master and her student spar, and thus is the passage of the unceasing torrent of time. Just how long has it been? His duel with his master, centuries ago, still rippled like a memory from yesterday. But the few years between now and when he took in the boy as his student felt like a lifetime. Time gallops, swift as a stallion, sudden as a lightning strike, agonizing as a blade that runs him through. And yet, it feels like everything has always been the same.

Official synopsis from AniList.