The OVA introduces a unique team-based relay format, dividing the Tracen Academy roster based on which leg of the Triple Crown they historically won: Team B (Kikuka Sho) : Led by Biwa Hayahide. Team N (Satsuki Sho) : Led by Narita Taishin. Team W (Japanese Derby) : Led by Winning Ticket. Anime/BNW no Chikai | Umamusume Wiki | Fandom

In terms of gameplay, the BN no Chikai Repack event introduces new challenges and features, including:

: While Hayahide and Ticket are open to the idea, Taishin remains distant. Much of the OVA involves the other horse girls—including Narita Brian, Hayahide’s sister—encouraging Taishin to rediscover her competitive spirit.

anime. Originally released in late 2018 and early 2019, it was bundled with the fourth Blu-ray volume of the television series. Umamusume Wiki Core Story & Characters

While originally a physical release bonus, the BNW no Chikai OVA is often included in comprehensive digital "repacks" or special edition bundles for the first season. Fans can find it on major anime database sites like MyAnimeList or through various streaming community platforms. Uma Musume: Pretty Derby - BNW no Chikai