In the distant future, a majority of humans have left the Earth, and the Galactic Alliance of Humanity is founded to guide exploration and ensure the prosperity of mankind. However, a significant threat arises in the form of strange creatures called Hideauze, resulting in an interstellar war to prevent humanity's extinction. Armed with Chamber, an autonomous robot, 16-year-old lieutenant Ledo of the Galactic Alliance joins the battle against the monsters. In an unfortunate turn of events, Ledo loses control during the battle and is cast out to the far reaches of space, crash-landing on a waterlogged Earth. On the blue planet, Gargantia—a large fleet of scavenger ships—comes across Chamber and retrieves it from the ocean, thinking they have salvaged something of value. Mistaking their actions for hostility, Ledo sneaks aboard and takes a young messenger girl named Amy hostage, only to realize that the residents of Gargantia are not as dangerous as he had believed. Faced with uncertainty, and unable to communicate with his comrades in space, Ledo attempts to get his bearings and acclimate to a new lifestyle. But his peaceful days are about to be short-lived, as there is more to this ocean-covered planet than meets the eye.

Life in the bustling city of Orario is never dull, especially for Bell Cranel, a naïve young man who hopes to become the greatest adventurer in the land. After a chance encounter with the lonely goddess, Hestia, his dreams become a little closer to reality. With her support, Bell embarks on a fantastic quest as he ventures deep within the city's monster-filled catacombs, known only as the "Dungeon." Death lurks around every corner in the cavernous depths of this terrifying labyrinth, and a mysterious power moves amidst the shadows. Even on the surface, survival is a hard-earned privilege. Indeed, nothing is ever certain in a world where gods and humans live and work together, especially when they often struggle to get along. One thing is for sure, though: a myriad of blunders, triumphs and friendships awaits the dauntlessly optimistic protagonist of this herculean tale. [Written by MAL Rewrite]

Tooru Honda has always been fascinated by the story of the Chinese Zodiac that her beloved mother told her as a child. However, a sudden family tragedy changes her life, and subsequent circumstances leave her all alone. Tooru is now forced to live in a tent, but little does she know that her temporary home resides on the private property of the esteemed Souma family. Stumbling upon their home one day, she encounters Shigure, an older Souma cousin, and Yuki, the "prince" of her school. Tooru explains that she lives nearby, but the Soumas eventually discover her well-kept secret of being homeless when they see her walking back to her tent one night. Things start to look up for Tooru as they kindly offer to take her in after hearing about her situation. But soon after, she is caught up in a fight between Yuki and his hot-tempered cousin, Kyou. While trying to stop them, she learns that the Souma family has a well-kept secret of their own: whenever they are hugged by a member of the opposite sex, they transform into the animals of the Chinese Zodiac. With this new revelation, Tooru will find that living with the Soumas is an unexpected adventure filled with laughter and romance. [Written by MAL Rewrite]

High school student Yoshiharu Sagara wakes up and finds himself in the middle of a raging Sengoku period battle. He is saved by the legendary Hideyoshi Toyotomi, but at the cost of the hero's life. With his dying breath, the warrior pleads for Yoshiharu to become a feudal lord in his place. Now that the course of history has been changed, Yoshiharu pledges to keep the timeline from diverging any further. Yet, after rescuing Nobuna Oda—whom he discovers is actually the fabled Nobunaga Oda's female counterpart—Yoshiharu realizes he has been transported to an alternate reality where most of Japan's historical warlords are now cute girls! To set things right and find a way back home, Yoshiharu agrees to become one of Nobuna's retainers and assist her in a conquest of Japan. As Nobuna initiates her campaign, Yoshiharu discovers that the history he learned from playing the video game "Nobunaga's Ambition" allows him to predict future events and turn the tide of war. Using this invaluable gift to aid the Oda clan's beautiful generals, Yoshiharu hopes to help his new lord fulfill her dream and win the hearts of women everywhere. [Written by MAL Rewrite]