"A treasure chest of unspoken courage is opened."
The special is described as a collection of shorts, showing past instances of courage and personal growth by the cast of Ousama Ranking.
(Source: Ranking of Kings Wiki)
AniMojo is the best site to watch Ousama Ranking: Yuuki no Takarabako online and download Ousama Ranking: Yuuki no Takarabako for free. You can also find Wit Studio anime on AniMojo website with English Sub/Dub.
