Hard Battle Arrives! is the twelfth volume of the Katekyo Hitman Reborn!.
- Chapter 099: XANXUS' Smile (
ＸＡＮＸＵＳの笑み, Zanzasu no emi?)
- Chapter 100: Prince the Ripper (プリンズ・ザ・リッパー, Purinzu za Rippā?)
- Chapter 101: Hayato Gokudera vs. Belphegor (獄寺隼人
ＶＳ.ベルフェゴール, Gokudera Hayato vs. Berufegōru?)
- Chapter 102: Genius's Knife (天才のナイフ, Tensai no naifu?)
- Chapter 103: Attack of Raging Waves (怒涛の攻め, Dotō no seme?)
- Chapter 104: Conclusion (決着, Kecchaku?)
- Chapter 105: Hibari Returns (雲雀戻る, Hibari modoru?)
- Chapter 106: Yamamoto's Choice (山本 武の選択, Yamamoto Takeshi no sentaku?)
- Chapter 107: Takeshi Yamamoto vs. Superbi Squalo (山本 武
ＶＳ.スペルビ・スクアーロ, Yamamoto Takeshi vs. Superubi Sukuāro?)
Tsuna's ring is taken from him for having interfered in Lambo's fight. As such, the result of the battles between the Varia and Tsuna's Family is at 2 to the Varia because of Tsuna's interruption and 1 to Tsuna and his Guardians. The fight of the Storm Guardians starts between Gokudera and Belphegor, who battle inside Nanimori High. Belphegor uses "flying" knives to stop all of Gokudera's dynamites. However, Gokudera discovers that all the knives are attached to threads, and manages to injure Bel by improving the movements of his bombs. When the school starts exploding, Gokudera heeds Tsuna's advice of escaping which results in his loss. As Xanxus hints that something happened to the 9th boss, Iemitsu Sawada returns to Italy to see what happened to the boss. Meanwhile, the fight between Yamamoto and Superbia Squalo, the swordsman who attacked Basil to get the Half Vongola Rings, starts at the underground level of Namimori Middle School.