There's no such thing as too much preparation! The fate of the S\-ranked world Gaeabrande rests with the novice goddess Ristarte. As she thumbs through the piles of duller\-than\-dull résumés for potential Heroes to summon, she hits the jackpot with Seiya Ryuuguuin, whose stats are so high for a level\-1 Hero that he's practically cheating! (He's also pretty easy on the eyes.) But there's a catch. Seiya is cautious to a fault. If he goes to a weapons and armor shop, he asks for three sets of one to wear, a spare, and a spare for the spare. Just in case. He always buys ridiculous amounts of supplies, trains like he's racing to max level, and won't hesitate to use his strongest skills even on a simple slime. With a Hero like Seiya on the job, which will run out first\-the Demon Lord's forces or Ristarte's sanity...? The tale of the overpowered yet overly cautious Hero and the goddess who can't decide if she wants to kiss him or smack him begins!

Everything's gonna be okay... The difficulty ramps up as Gaeabrande proves just how tough an S\-ranked world can be! But whether his foe is a gargantuan lord of the flies boasting unparalleled speed and agility or an invulnerable god of death who makes all previous enemies seem like jokes, Seiya does what he does best...He retreats to the spirit world and trains like there's no tomorrow. Along his never\-ending road to self\-improvement, he encounters a new deity with a certain...quirk, masters an ability so far beyond overpowered that it's completely broken, and makes Rista extremely upset! Again! The kid gloves (and weighted bracelets) come off as the battle with the Demon Lord looms just beyond the horizon. But for all the training he's done, will Seiya be perfectly prepared this time...?

When the going gets tough, the tough get tougher! Well, this isn't the homecoming anyone expected...After liberating Gaeabrande from the tyranny of the Demon Lord, Seiya and Rista are rewarded (punished, really) with a return trip to Ixphoria. But due to the pair's failure to save the B\-ranked world, the baddies have leveled up and plunged Ixphoria into chaos, transforming it into an SS\-ranked hellscape! With the added penalty of Rista's healing being sealed and no access to the Hero class, Seiya must now save the world as...a Jolly Piper...?

Robots versus Golems! Rampaging past his limits in his new Berserk Mode, Seiya emerges victorious from the 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. His high\-tech arsenal, replete with tens of thousands of killing machines, threatens to wipe Termine Kingdom off the map! Fortunately, Seiya's got a secret weapon! ...Sort of.

WHAT COULD HAVE BEEN... Beast Emperor Grandleon, Machine Emperor Oxerio, and Vengeful Empress Celemonic have all been defeated by the cautious Hero. As Seiya, Rista, Kiriko, and Jonde travel to the west to face the Death Emperor, the last of the Demon Lord's generals, though, they are wholly unprepared for what they a town full ofhappy people, all living peaceful lives. And why wouldn't they be? According to them, the Demon Lord was defeated over a year ago by none other than Seiya Ryuuguuin himself! As the party's heads flood with questions, a familiar silhouette appears on the horizon...

ある神の襲来により神界が崩壊!気を失ってしまったリスタが目を覚ますと、そこは一度救ったはずの「ゲアブランデ」。だが、かつて仲間だったはずのロザリーは悪魔と手を組んでいたり、魔王軍直属四天王だったケオス\=マキナは人間の味方になっていたり…。いったい、どうなってるの!!混乱するリスタだが、捻れた世界を救うため再び聖哉を召喚する。ただし今回の修業先は―冥界!?成長した女神リスタと相変わらず慎重な勇者聖哉が、捻曲世界の救済に挑む!!

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?!