Iwatani Naofumi, a run-of-the-mill otaku, finds a book in the library that summons him to another world. He is tasked with joining the sword, spear, and bow as one of the Four Cardinal Heroes and fighting the Waves of Catastrophe as the Shield Hero. Excited by the prospect of a grand adventure, Naofumi sets off with his party. However, merely a few days later, he is betrayed and loses all his money, dignity, and respect. Unable to trust anyone anymore, he employs a slave named Raphtalia and takes on the Waves and the world. But will he really find a way to overturn this desperate situation?
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see all options Availability data: JustWatch
- Seasons
- 5
- Episodes aired
- 62
- Latest aired
- S04E12
- Total runtime
- 1d
Timeline when each season aired
- Season 1 January 2019 – June 2019 25 episodes
- the show was away for 2 years and 9 months
- Season 2 April 2022 – June 2022 13 episodes
- Season 3 October 2023 – December 2023 12 episodes
- the show was away for 1 year and 6 months
- Season 4 July 2025 – September 2025 12 episodes
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S02E01 A New Roar
April 6 · 23min find the promo
Show synopsis
Mysterious monsters appear as Naofumi is preparing for the next Wave. At the same time they show up, the Wave countdown stops. The Queen summons the Four Cardinal Heroes, and tells them that the Spirit Tortoise has revived.
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S02E02 Footprints of the Spirit Tortoise
April 13 · 23min find the promo
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The leaders of all the nations’ militaries gather in the Spirit Tortoise Kingdom. Naofumi is there as well, and promises to offer his help as one of the heroes. But just before they decide on a plan, a mysterious woman appears…
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S02E03 Shaking Land
April 20 · 23min find the promo
Show synopsis
The Spirit Tortoise begins its march once more, appearing at the border of the kingdom bearing its name. Naofumi volunteers to lure away its familiars while the army tries to bring it to the mountains. The Spirit Tortoise’s familiar, Ost, fights alongside the humans…
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S02E04 Ruins in the Fog
April 27 · 23min find the promo
Show synopsis
The Spirit Tortoise’s head was cut off, but Ost, its familiar, is still alive. It could revive at any moment. The allied armies need to get back into fighting shape, and fast. Naofumi makes the risky move of heading onto the Tortoise’s back with only a small group, and tries to find its true weak spot.
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S02E05 Ost Hourai
May 4 · 23min find the promo
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Naofumi is met by L’Arc, Glass, and Therese. They’re after the person who broke the Spirit Tortoise’s seal and is controlling it. L’Arc proposes teaming up again…
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S02E06 Racing to Catch Up
May 11 · 23min find the promo
Show synopsis
Fitoria appears when the Spirit Tortoise revives, and with her help, Naofumi attempts to destroy its heart and cut off its head at the same time. L’Arc arrives as well, but all of them are helpless before Kyo’s overwhelming power.
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S02E07 Infinite Labyrinth
May 18 · 23min find the promo
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Naofumi wakes up in a strange prison to find him and his party at level 1, and Filo missing. They start to raise their levels in order to escape, but things quickly turn against them when a dangerous monster suddenly appears…
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S02E08 A Parting in the Snow
May 25 · 23min find the promo
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Naofumi’s party heads for the Dragon Hourglass of Mikakage, in order to get to Sikul, the country that summoned Kizuna. Along the way, he sells rare healing items to make a hefty profit. He hears a rumor about a genius mage…
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S02E09 Humming Fairy
June 1 · 23min find the promo
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Naofumis party is teleported to Sikul, where Kizuna introduces the Vassal Weapon Hero, Ethnobalt. He soys he can use a piece of Raphtalia's hair and Naofumis blood as a catalyst that can create a shikigami to find her. He creates the shikigami, and they find.
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S02E10 Katana Hero
June 8 · 23min find the promo
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Raphtalia is imprisoned in a Raybul Kingdom prison. She’s wary of L’Arc’s team, who is also imprisoned there, but asks them for help in escaping. Glass is weakened by the draining power of the prison. Raphtalia has a plan to escape, but…
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S02E11 Kizuna
June 15 · 23min find the promo
Show synopsis
Naofumi's party is overjoyed to be reunited with Raphtalia. Kizuna criticizes Glass for invading another world. Glass and L'Arc swear they won't fight Naofumi anymore, and instead find another way to solve their problem. Meanwhile, Kyo's plot proceeds.
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S02E12 Reason to Fight
June 22 · 23min find the promo
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The Wave appears before its scheduled time. Kizuna's group is teleported to it while Naofumi and his party head for Kyo's lab on Ethnobalt's ship. There, they see the true depths of Kyo's wickedness...
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S02E13 Flowers Offered in Recollection
June 29 · 24min find the promo
Show synopsis
Raphtalia recalls having to buy clothing for her smaller self. Kizuna remembers being alone for so long. Rishia remembers Ost trying to give advice.