漫然と生きていたゲーマーが、友人2人と迷い込んだ異次元の東京。そこで次から次へと理不尽なゲームを突きつけられた彼らは、生きるか死ぬかの戦いを強いられる。
Arisu Ryohei and Usagi Yuzuha have been pursuing the mystery of “borderland”, risking their lives in games in order to survive and return to their world. The two of them encounter friends, foes and the mastermind who controls the game at a location believed to be the key to unravelling the mystery. They have collected the numbered cards each time they won a game. All that remains are the jack, queen and king cards. The games they face this round will be of greater difficulty than the ones that came before.