16-year-old Mochizuki Touya has it all. Grand Duke of an upstart nation, inventor of goods ranging from hula hoop to caramelized popcorn, administrator of Babylon, and pilot of the Anti-Phrase Frame Gears. The western nations love him... but darker machinations unfurl in the far east. Yulong, the glorious Empire of Heaven, regards Touya with envious eyes, brazen enough to send assassins into Brunhild! To make matters worse, the mysterious young girl known as Sakura seems to have a connection with these dark assailants. In the background, dark forces gather. Something big approaches. Something far greater than anything Touya has ever faced before. Brace yourself... for a tale of swords, sorcery, and absolute calamity.

16-year-old Mochizuki Touya continues everyday life in his new world, well aware that it could all come tumbling down at any moment. He's the budding administrator of Babylon, the fledgling grand duke of Brunhild, and now he's a... mecha pilot? Desperate to find a way to halt the incoming Phrase onslaught, Touya makes a mad dash for the Hangar of Babylon, hoping it can give him the edge he needs. What he finds is the Frame Gear, an ancient humanoid fighting machine! Join Touya and his ever-growing band of wives as they tap into their mechanical sides. All systems standby for a tale of swords, sorcery, and oversized wrenches.

Stalwart as ever, 16-year-old Mochizuki Touya heads off to the far eastern land of Eashen with his party in tow. For what purpose? The Matriarch of the Fairy Clan wishes to delve into some ancient ruins, of course! But it's never quite that simple for Touya and his friends, oh no. The party is thrust into the midst of a clash between the warlords Takeda Schingen and Tokugawa Ieyahsu, while a nefarious necromancer makes his move in the shadows... Throw in a Gynoid or two, an ancient legacy, another ridiculous summoning pact, and you've got yourself a brand new recipe for disaster! Once more the sun rises upon an epic tale of sorcery, smartphones, and floating cities!

Undeterred by his untimely death on Earth, 15-year-old Mochizuki Touya continues to meander around in another world! After a series of misadventures, the young man has assembled a motley crew of adventurers including the timid mage Linze, the feisty brawler Elze, the ever-hungry samurai Yae, and even the young archer Yumina, heir to the Belfast throne. Together with his party (and a divine white tiger), Touya sets his sights on the horizon, heading for the demi-human kingdom of Mismede! But all is not what it seems... the beastman king issues a personal challenge, and a black-scaled dragon could soon spell out Touya's doom! The curtains lift once again on an epic tale of sorcery, smartphone apps, and... gunblades?!

Still struggling to unite two worlds, fledgling god Mochizuki Touya carries on with his work. The mutants continue to attack the Reverse World, hungrily devouring the souls of the fallen in service of Yula and the wicked god. And so, it's up to Touya to teach another set of off-worlders how to pilot the Frame Gears! Hopefully he's not too late... Elsewhere, a mystery unfurls regarding a long-lost prince of a devastated kingdom... Perhaps the Mage-King of Isengard has the answers Touya seeks? Chaos runs rampant, tearing open the veil upon a story of swords, sorcery, and heterochromia!

The conflict with the wicked god has come to an end, and Touya now presides over a unified planet. Peace may yet return to the world, but it's still far from paradise! Touya must resolve a centuries-long misunderstanding between two feuding nations, deal with a new matter of interest in the divine realm, and handle whatever small national matters come his way, all while planning for his long-awaited weddings! Sit back and relax before a story of swords, sorcery, and political intrigue!

The two continents have finally collided, but the dawn of this new world is quickly overcast by a sinister bombardment from the space between worlds. What foul machinations has the wicked god orchestrated? Touya may not live to find out! The unstoppable Grand Duke of Brunhild has finally met his match in the form of a poison that can render he and everyone he loves completely powerless! Pack your antidotes and prepare for a tale of swords, sorcery, and drones!