Kurata Tsubasa is not your average citizen. Sure, he's a genius programmer and software engineer, but as far as he's concerned, his most important trait is that he's a hardcore mecha nerd. So, what happens when you take that nerd and reincarnate him into a fantastic world of swords and sorcery? Well, you'd think he'd be disappointed...but this world has magical giant robots! Obviously, Tsubasa—reborn as Ernesti Echevalier—now wants to devote his life entirely to these wondrous pieces of technology. But how exactly can young Ernie achieve his ultimate goal of getting his very own mech? He'll have to rely on his imagination, uninhibited by the common sense of this new world, as well as his extreme dedication and focus! He also might just find help in the form of a rather interesting quirk... (Source: J-Novel Club)

Waking up in a strange new place with no memory of his past life, Kelvin learns that he’s bartered away those very memories in exchange for powerful new abilities during his recent transmigration. Heading out into a whole new world as a Summoner — with his first Follower being the very goddess who brought him over! — Kelvin begins his new life as an adventurer, and it isn’t long before he discovers his hidden disposition as a battle junkie. From the Black Knight of the Ancient Castle of Evil Spirits to the demon within the Hidden Cave of the Sage, he revels in the fight against one formidable foe after another. Join this OP adventurer in an exhilarating and epic saga as he and his allies carve their way into the annals of history! (Source: J-Novel Club)

At the end of World War II, a demon-summoning ritual drastically altered the face of the earth. Now, a hundred years later, demons rule the world, and humanity fights back using magicite-powered armored mechs. In the year 2055, a boy named Keita Kawakami enrolls in Japan's military academy. Possessing memories of an alternate modern era, he successfully pilots a prototype mech that no one else has even been able to activate. When Keita is suddenly deployed to the battlefield, he uses the knowledge from his previous life to achieve results that defy all established norms. Thus begins humanity's battle to reclaim the world. (Source: Yen Press)

The time is 10:00 pm, 24th December, the night of Christmas Eve.Proclaiming herself the Demonic Dragon Princess, the beautiful Ahrian declares war against the entire world. Her proclamation, subsequently know as the "Demonic Dragon Declaration",completely altered the life of Kagari, who has always wanted to live a quiet peaceful life.The city Kagari lives in faces an invasion by the "Six Imperial Demonic Dragons".To defeat the Demonic Dragons, cute girls known as "Holy Swords" have also gathered in this city. In order to protect this city as well as safeguarding his peaceful and quiet life,Kagari joins the Holy Swords in a struggle against the Demonic Dragons! ---- From Animesuki

In A.G. 101 (the 101st year of the Advanced Generation calendar) a mysterious entity known only as "UE", or "unknown enemy", attacks and destroys the space colony Angel. This brutal attack becomes infamous as the "The Day the Angel Fell", and marks the beginning of humanity's war for survival. The series begins in A.G. 108 when the UE attack the space colony Ovan, where Flit Asuno lives with his mother. Flit's mother is killed by the UE, and in her belongings (in an object called a "AGE Device") he discovers the blueprints for a powerful weapon from the past - the ancient messiah named "Gundam." From these blueprints, Flit spends the next several years studying engineering at an Earth Federation base on the Nora space colony and designing the AGE-1 Gundam. Seven years later, in A.G. 115, Flit completes the Gundam, just as the UE attack Nora. Flit and his lineage's battle piloting the AGE-1 to protect mankind is about to begin.

It is an era of change that was brought about by the discovery of the New World. A young man named Diego, who lived in the maritime nation of Spinea, was a researcher of the art of Onmyojutsu which was considered illegal. Due to that, he was attacked by a mysterious young woman who doubted the source of his powers, and even the Holy Church started to take an interest in him. Diego, who had no other options, decided to board a ship that was headed on a research expedition to the New World along with his long-time friend Alvaro. The New World had a Tree of Gold that towered over the surroundings, and the forests were protected by colossi. Waiting for the two of them there was the girl, Rera, who was confined in a prison of water. Diego was ordered by Captain Joaquin of the expeditionary force to use his Onmyojutsu and find a way to get her out. However when Rera awakens, the young lady who had attacked him in Spinea, Rozen, makes an appearance. She is the rider of the colossus "Tankamui." Is Diego going to get caught up in the great battle between the maritime nation and the natives—? (Source: Kadokawa)