High School DxD Episode 5, "I Will Defeat My Ex-Girlfriend!", concludes the Raynare arc as Issei taps into the Boosted Gear to avenge Asia, who is subsequently revived as a devil by Rias. This pivotal episode shifts the series from comedic harem to emotional action, establishing Issei's potential as a "longinus-tier" threat. For more details, visit High School DxD Wiki .