- Chapter 300: Upgrade ((
Ｖｅｒ.アップ, Bājon appu?))
- Chapter 301: Preparation ((決意, Ketsui?))
- Chapter 302: The Pursuit ((追跡, Tsuiseki?))
- Chapter 303: The Battle Begins ((開戦, Kaisen?))
- Chapter 304: Ryohei Sasagawa vs. Kouyou Aoba ((笹川了平
ＶＳ.青葉紅葉, Sasagawa Ryohei vs. Aoba Kouyou?))
- Chapter 305: Vongola Gear of The Sun ((晴の
Ｖ Ｇ, Hare no Bongore Gia?))
- Chapter 306: Eye ((眼, Me?))
- Chapter 307: Limit ((限界, Genkai?))
- Chapter 308: The Key ((「鍵」, Kagi?))
- Chapter 309: Chrome Dokuro and Julie Kato ((クローム髑髏と加藤ジュリー, Kurōmu Dokuro to Katō Jurī?))
- Chapter 310: Lambo! Lambo! Lambo! ((ランボ！ランボ！ランボ！, Ranbo! Ranbo! Ranbo!?))
The Guardians get their Rings upgraded to the Vongola Gear, and the remaining Guardians head to the Simon Island to confront their attackers. Upon arriving, a battle with the Simon Famiglia against the Vongola Famiglia is announced, with the Vindice acting as judges. During each battle, the battling Guardians' pride would be at stake, with the loser being imprisoned in the Vindice Prison. Tsuna and his Guardians battle throughout the island, unlocking memories of the Vongola Primo, Giotto, and the First Simon boss, Simon Cozzato. With each battle they fight's memories, slowly begin to understand what really happened between these two people who were once considered to be as close as brothers.
- In this volume, there's one exclusive panel that shows Kouyou briefly reminisced his past during his fight Ryohei, that's not available in the Shonen Jump Magazine.