No sooner have Seiya and his friends made it back from Dragon Village than it's time for them to face a new enemy-the Demon Lord's army's absurdly fast airborne strike force! And when they save the beautiful knight Rosalie, captain of the Roseguard Imperial Knights, from this horde of demonic flies, her hot-blooded personality is sure to put her at odds with the legendarily cautious Seiya...

Well, this probably isn't the kind of homecoming anyone expected... After saving the Gaeabrande, Seiya and Rista are rewarded (or punished) with a one-way trip to Ixphoria. Due to their failure to save the B-rank world in the past, the baddies have leveled up and plunged Ixphoria into chaos, transforming it into an SS-Ranked Hellscape! And just when it seemed like things couldn't get any worse, Seiya falls victim to a class-changing curse! Now the Overly-Cautious Hero must save this impossibly difficult realm as...a playful piper...?

After pushing himself well past his limits, Seiya emerged victorious from his Battle with the Beast Emperor, Grandleon! But his struggles in the revamped world of Ixphoria have only just begun... Next on the chopping block is the Machine Emperor, Oxerio. The high-texh arsenal replete with tens of thousands of magical weapons threatens to plunge Seiya and Rista into the depths of despair! Fortunately, Seiya's got a secret weapon! ...Sort of.

In order to learn Valkyrie's ultimate abilities, the Techniques of Destruction, Seiya has begun training with her, but the way they'AEore going about it has Rista more than a little flustered! Whispering 'AEuI'AEove...never felt this way before'AEu...while in bed...naked in each other'AEos arms'AEihold on, how the hell is this supposed to be training?!?!?!?!?!?!

Beast Emperor Grandleon, Machine Emperor Oxerio, and Vengeful Empress Celmonic have all been vanquished. Seiya and Rista venture to the sand territory to face the last of the Demon Lord's forces, but are wholly unprepared for what they find. They are greeted by an alternate Ixphoria where Seiya never lost to the demon lord, and he and Tiana are living a happy life together; the future that could have been...

Feeling ill-prepared for the looming battle against Mash the Dragon King, Seiya returns to the underworld to acquire some new skills. But every boon gained from this dark realm comes at a cost. While Seiya practices a stealth ability, Rista turns invisible! As he hones the power of darkness, disaster strikes! Will Seiya be able to master these new techniques before the drawbacks wipe out his party?!

The continuing misadventures of Seiya, the absurdly overcautious hero who tried to buy a thousand bottles of holy water as soon as he knew he'd be fighting undead, and Rista, a goddess who's always waving her "literally holier than thou" attitude in his face! Things start off badly when Seiya immediately butts heads with the Dragonkin who were supposed to become his allies-and does he have a plan for dealing with the army of ten-thousand undead approaching the town?!

The invasion of a malevolent deity has brought the spirit world to its knees. Rista falls unconscious amid the turmoil, and when next she opens her eyes, she finds herself in Gaeabrande... And if that wasn't confusing enough, it seems Rosalie Roseguard has teamed up with none other than Chaos Machina, now an ally of humanity! Nothing makes sense anymore, so why not double down on the chaos? This time, in order to save the spirit world, Seiya's next training destination will be...the underworld!

The goddess Lista summons a hero who excels in every area to assist her. He's everything she expected him to be except for one, tiny thing: this anxious hero can't do anything unless he's absolutely sure nothing can go wrong!

Seiya, the Hero whose boundless strength is surpassed only by his pathological overcautiousness, is in need of a new training partner after mentally scarring Cerceus the Divine Blade into becoming a baker. Rista decides to pair him with Adenela, the near-psychotic Goddess of War, who will surely whip him into...she's not falling for him, is she?!