Ousama Ranking: Yuuki no Takarabako
Type: Spring 2023 Anime
Plot Summary: "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.
Other name: 王様ランキング 勇気の宝箱 / Ranking of Kings: The Treasure Chest of Courage / Ranking of Kings: Treasure Chest of Courage