High School DxD Hero

Mythic mayhem meets high‑school hijinks as Issei fights to clear his name and protect a stolen fox.

After a harrowing rescue from the Dimensional Gap, Issei Hyoudou finally gets to swap his battlefield armor for a school uniform, rejoining the eclectic members of the Occult Research Club—Yuuto, Asia, Xenovia, and Irina—for a long‑awaited field trip to Kyoto. What starts as a serene temple visit, courtesy of Rias Gremory’s protective spell, quickly devolves into chaos when a pack of rogue youkai ambushes the group. The melee ends with a shocking revelation: the city’s legendary nine‑tailed fox guardian has been stolen, and the club is being framed for the theft. Determined to clear their names and prevent a supernatural catastrophe, Issei and his allies must dive headfirst into a battle that blends ancient myth with modern high‑school drama, all while trying not to lose their composure amid the escalating ecchi antics. Back in Tokyo, Rias wrestles with a restless anxiety, fearing that leaving the lecherous Issei alone with the other girls might spark unforeseen complications. Her lingering doubts about her own feelings for Issei add a layer of emotional tension to the otherwise action‑packed narrative. As the stakes rise—both in the streets of Kyoto and within the tangled hearts of the club members—"High School DxD Hero" delivers a roller‑coaster of battles, bawdy humor, and budding romance, cementing its place as the series’ most myth‑laden and character‑driven arc yet.

This fourth season continues the supernatural harem action with significantly ramped-up sexual content, featuring near-constant nudity and explicit physical comedy centered on the protagonist's perversion. The plot involves mythological factions battling over a kidnapped fox spirit, but the narrative primarily serves as a vehicle for fanservice rather than substantive storytelling.