[raizel] Highschool Dxd - 04 - I-m Saving My Fr... -

While the anime episode focuses on Asia's rescue, the "04" designation also appears in other parts of the franchise:

Peace treaty signed; introduction of the White Dragon Emperor. "How to Lead a Life as a Hero" Battle with Cao Cao and the Hero Faction in Kyoto. [Raizel] Highschool DXD - 04 - I-m Saving My Fr...

The phrase is the title of the fourth episode of High School DxD 's first season. In this pivotal episode, Issei Hyoudou ignores Rias Gremory’s warnings to rescue Asia Argento from the fallen angel Raynare. Episode Overview While the anime episode focuses on Asia's rescue,

Rias explains the power of a Pawn piece, revealing that Issei can undergo Promotion to gain the abilities of any other chess piece (except King) once he is in enemy territory. [Raizel] Highschool DXD - 04 - I-m Saving My Fr...