Unsuspecting inhabitants of the planet Earth are going about their business, enjoying a bright and particularly beautiful sunny day, when a young Japanese boy spots a shiny object falling from the sky... Has an alien invasion finally begun?
Elsewhere in Japan, Keroro, frog sergeant and leader of the Space Invasion Army Special Tactics Platoon of the 58th Planet in the Gamma Planetary System, has discovered the perfect hideout. He infiltrates the home of the Hinata family in an attempt to establish a headquarters that he and his troops could use to prepare for world domination... but earthlings Fuyuki and Natsumi Hinata are too much for him to handle! Natsumi instinctively calls them out of hiding, leaving the hapless sergeant no option but to reveal his secret identity. The two siblings soon welcome the sergeant to their home, all thanks to Fuyuki’s generos—err... curiosity.
The Sergeant has successfully infiltrated his first target area! Or has he? Join Keroro Gunsou in his dastardly attempt to take over the world!
A catastrophic earthquake has left Tokyo, and most of the Earth for that matter, under the sea. Aika is a salvager who retrieves various remains from the watery ruins. When Aika accepts the dangerous mission of locating and obtaining the mysterious Lagu, she discovers that she's not the only one after it.
Hikari Kohinata is a cheerful 15-year-old girl who lives near the ocean and she spends much of her time diving as a result. On her first day of high school, she meets a teacher who also likes scuba diving. There's also a 16-year-old classmate, Futaba, who gets dragged along in Hikari's maelstrom as soon as they meet at school.
Li Meifon is the head of a free, no expenses paid protection/security agency for escorting ships across outer space. Though only 16, she posesses great skill and leadership qualities while commanding her crew aboard their ship, the "Angel Links." However, some unpleasant memories begin to trouble her and she starts questioning her own past and reason for existence. Join Li Meifon and the rest of the Angel Links crew on their adventures through the Oracion star system as they battle pirates, government organizations, and a Tao master, all while finally uncovering Meifon's dark and mysterious past.
12-year-old Misaki Suzuhara has just gotten involved in Angelic Layer, a battling game using electronic dolls called angels. Even as a newbie, Misaki shows advanced skills as she meets new friends and enters Angelic Layer tournaments to fight the greatest Angelic Layer champions of the nation.
The atmosphere in True Cross Academy is lively and boisterous in the days leading up to the grand festival held once every 11 years. During this time, Okumura Rin is entrusted with the responsibility of suppressing the berserk Phantom Train. In the midst of his mission, he meets a devil whose appearance is that of a young boy.
Hotaru Tachibana has a strong sense of justice and just cannot help confronting those who choose to perform malicious acts. Furthermore, Hotaru is actually a girl who likes to disguise herself as a boy. After hearing rumors that her best friend was tricked by the popular host of a local club, Hotaru seeks to punish the evildoer. Upon arriving at the club, however, she is challenged to a so-called "survival game" by the host Masamune Matsuoka, where the first person hit by the bullet of a toy gun will lose.
After a destructive fight which results in Hotaru's loss, Masamune forces the young "boy" to join his survival game team named Toy Gun Gun, in order to repay the cost of the damages that "he" has caused inside the club. Although she is initially unhappy with this turn of events, Hotaru quickly begins to enjoy what survival games have to offer and is determined to pay off her debt, much to the dismay of Tooru Yukimura, the other member of Toy Gun Gun. As time goes on, Hotaru begins to develop a close friendship with the rest of the team and hopes to take part in realizing their dream of winning the Top Combat Game (TCG), a tournament to decide the best survival game team in Japan.
Although Hotaru tries her best, there are just two little problems: she is absolutely terrible at the game, and Toy Gun Gun doesn't allow female members on their team!
When aviation mechanic (and anime fanboy) Takuya Isurugi is transferred to the 801st Tactical Training Squadron, he gets more than he bargained for. Moderated by hard-headed veteran ace Mitsuru Konishi, the "Airbats" are an all-female aerial acrobatic team consisting of loose cannons Miyuki Haneda and Arisa Mitaka, karaoke freak and gambling genius Sakura Saginomiya, and junk food lover Yoko Shimorenjaku. Both Haneda and Mitaka do not get along with each other, and their rivalry worsens when they both fall for Isurugi. But with the entire JASDF having doubts about the team, the Airbats must work as a team or face total disbandment.
Since childhood, Tadahiro Amatsu has two different-colored eyes - one brown and one light hazel. But because of a dark secret behind his left eye, he's become a target for the masked sorcerer Ayatara Miramune and his band of demons. To combat the demons appearing all over town, Yuzu Hieda, a priestess in training, recruits four other girls from her high school. Under the supervision of Yuzu's elder sister Kurako, the five young priestesses must undergo months of training to master their abilities.
The story revolves around Kakazu Kio, an ordinary high school freshman living in Okinawa. A girl with cat ears appears before him during a memorial service for one of his family ancestors. The girl calls herself Eris and claims she is an alien. Before long, fanatical alien worshipers and a mysterious government agency are in hot pursuit of Eris, but Kio's childhood friend Manami—who wants to follow in her father's footsteps in the CIA—captures Eris. Kio finds himself having to protect Eris from everyone.