Before Kazuma reaches the fantasy world, Megumin studies explosion magic, meets her familiar Chomusuke, and travels with Yunyun through the Crimson Demon village, the Red Prison, Alcanretia, and the road to Axel.
An Explosion on This Wonderful World! ends here
After his death, Kazuma is sent to a game-like fantasy world with Aqua as his chosen companion. The pair form a dysfunctional party with Megumin and Darkness, then face early quests, the Dullahan, and the Destroyer while trying to pay for ordinary life in Axel.
Kazuma and Aqua settle into Axel as the party handles a string of dangerous and ridiculous requests. A dungeon, Wiz's shop, a succubus service, and the mobile fortress Destroyer turn their search for money into a new home and a new legal disaster.
Season 1 ends here
Kazuma is put on trial after the Destroyer incident while Darkness is pushed toward a marriage arranged by her noble family. The party returns to the dungeon to clear Kazuma's name, defeats Vanir, and leaves the masked devil with a business connection to Wiz.
With their new income and new legal trouble behind them, the party travels to Alcanretia and encounters the Axis Church. A conflict with Hans, one of the Demon King's generals, turns a hot-springs visit into another fight that leaves the town's future in their hands.
Season 2 ends here
Yunyun brings news that the Crimson Demon village is under attack, so Kazuma's party follows her home. The village's history, Megumin's choices, and a weapon left by a previous Japanese visitor all become part of the battle against the Demon King's general Sylvia.
Legend of Crimson ends here
Kazuma's growing reputation brings him to the royal capital and into Princess Iris's orbit. A thief, a holy relic, Chris's hidden identity, and a conspiracy around the royal family make his attempt to earn a reward much more dangerous than the original audience.
Darkness agrees to marry Alderp to protect her family from debt, so Kazuma and the others disrupt the wedding. Vanir uncovers the demon Maxwell's role in Lord Dustiness's curse, and the party returns to Axel after turning the apparent scandal into a rescue.
Season 3 ends here
Aqua reacts to an Eris festival in Axel by creating a rival celebration. Kazuma and Chris pursue the sentient holy armor Aigis through both festivals, while a dragon and the town's adventurers pull the party into another public battle.
The party visits the front line after learning that Wolbach, a Demon King's general and a figure from Megumin's past, is attacking with explosion magic. Their response brings Megumin, Yunyun, and Kazuma into a fight that changes the balance around the fortress.
Kazuma escorts Iris to the neighboring nation of Elroad for what seems to be a marriage negotiation. When the promised military support is put at risk, he and the princess use gambling and a dangerous political plan to pursue the money needed for the war.
After the capital trip, Kazuma is sent back to Axel and finds his mansion occupied against his wishes. Megumin's younger sister Komekko arrives, and the party takes on a sequence of quests while trying to keep the new arrival safe from the Demon King's forces.
A new girl calls Darkness her mother, while tax collection and a handcuff accident draw the party into her family troubles. The town's debts, Darkness's feelings, and a demon count's banquet force the crusader to confront what she wants from the people around her.
A treasure-island expedition gives Kazuma's party another chance to profit, but the trip also puts Aqua's behavior and Wiz's past under pressure. The group's quests eventually bring Vanir and Wiz's relationship to a decision about what kind of future they want.
Kazuma's party returns to the Crimson Demon village while Yunyun attempts the trials to become its chief. Reports of unexplained explosions, rivalries, and the village's artificial history lead the group toward a new confrontation with old enemies.
A powerful priest named Serena gains followers in Axel and threatens Aqua's place in the town. Kazuma and the party investigate the priest's plans, endure a dangerous change in their abilities, and face a decision about whether Aqua should return to the heavens.
Aqua leaves Axel to challenge the Demon King alone, leaving Kazuma and the other adventurers to decide whether to follow her. Kazuma rebuilds his abilities through a difficult dungeon, while the party searches for a way to bring their goddess back.
Kazuma's party catches up with Aqua at the Demon King's fortress. They use their accumulated allies and resources to break through the barrier, reunite the party, and turn their long-running quest into a final confrontation with the Demon King.
* Arc names chosen by Arc Almanac, because the books don’t name them.
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