三春滝咲良（生田絵梨花）。生徒会美化委員長にしてギャンブルの名手である彼女は、賭場荒らしをする新入生、生志摩妄（柳美稀）と相対していた。賭場使用料支払いを賭けて2人が対戦するギャンブルは「丁半博打」。‘鋼の女’と‘恐怖を呼ぶ新入生’の勝敗の行方は？一方で、」先の対決を終えて奇妙な友情（？）で結ばれた芽亜里とつづらと戸隠は文芸部の賭場再興のためにある一手を打つ。それは、メイド姿の3人がディーラーとして立ち、サイコロを使ったギャンブル「メイドinダイス」を行う賭場の開設。これが男子生徒の評判を呼び大人気に。みるみる繁盛していくのだが、そこに再び生徒会役員が現れ・・・。
문예부에서 새로운 갬블 '메이드 인 다이스'를 시작한 메아리와 츠즈라, 토가쿠시에게 학생회 임원 미부오미가 찾아온다.
Sakura Miharutaki, the Student Council Beautification Committee Chair and master gambler, faced off against the gambling den-wrecking freshman, Midari Ikishima. The two competed in a game of "Chō-Han Bakuchi" with the gambling den's usage fees at stake. Meanwhile, having formed an odd friendship after their previous confrontation, Mary, Tsuzura, and Yukimi devised a plan to revive the Literary Club's gambling den. Their strategy? The trio, dressed as maids, would act as dealers in a dice-based gambling game called the "Magic Dice Game." The setup became a massive hit among male students, and the den quickly flourished. However, just as things were thriving, another Student Council member appeared.
