Raging Waves of the Storm Battle is the 45th episode of the Katekyo Hitman Reborn! anime.
Gokudera fights a losing battle to Belphegor, Varia's Storm Guardian. Belphegor's attacks were somehow going right to him, without much effort on Bel's part. However, Gokudera figures his secret of using wires when he fights, and unveils his new technique: Rocket Bombs. However, once Gokudera finally strikes Belphegor, he starts to act strangely because his blood has been spilled, unleashing his "Prince the Ripper" side.