第 9 集: Teruto 在關鍵的卡片對決中面對小學生的 Mikhail Saiki，以完成他的鑰匙。
2021年12月5日 播出
After regaining all of his memories, Teruto focuses on taking part in Rebuild Battles so that he can reach Kikka as soon as possible. When he is one card away from completing the key, a boy in elementary school named Mikhail Saiki challenges him to a match. Mikhail is a formidable opponent who is also only one card away from challenging the King. However, Mikhail is surprised to see Hiyori with Teruto. Mikhail realizes that Hiyori is the kind girl that helped him the other day. What will be the outcome of Teruto's final battle to complete his key? (Source: Crunchyroll)
集數
- 第 5 集 · 在敗給新京都之王姐姐後，Teruto獨自垂釣，而Kikka則被Higuma軟禁。
- 第 6 集 · Teruto 與團隊追擊卡牌教授 Dairo Keisen
- 第 7 集 · Hiyori 與朋友們前往 Neo Kyoto 的 Kamitoba Beach Resort，體驗虛擬海灘樂趣。
- 第 8 集 · Teruto在Kamitoba Beach Resort偶遇兒時玩伴Ai和Ishinome
- 第 9 集 · Teruto 在關鍵的卡片對決中面對小學生的 Mikhail Saiki，以完成他的鑰匙。
- 第 10 集 · 櫻挑戰國王，欲以特魯托完成的鑰匙奪回身體
- 第 11 集 · 照斗與奇奇卡展開兄弟Build-Divide之戰，飛熊瑪里奧則懷著惡意在一旁窺視。
- 第 12 集 · 特魯托在與奇卡交戰時回憶起新京都的真相，並尋求和解。