Naniwa Yuukyouden: Kanketsuhen

Koichi is the Japanese middle-school descendant of a race of extraterrestrials who crash-landed on the Earth 5000 years ago. He has psychokinetic powers which uses to fight the evil Yomi who wants to gain dominance over the world.

A mysterious object attacks and destroys any ship or submarine. Submarine 707 has the mission to search for that mysterious object, when summoned by a whale to follow it. The whale leads them to the world of Mu. But on their way they meet the mysterious object. They find out , it is Commander Red Silver, who had attacked the world of Mu to get Mu's magma sources. Submarine takes up the battle to defeat Red Silver and save Mu, and the world for that matter.

To lay low after messing around with a crime boss's daughter, Haijima Akira disguises himself as his sister at her high school teaching job. If he wants to keep his you-know-what off the chopping block, he has to navigate both modern womanhood and the cruelties of high school students — all without letting his masculine rage blow his cover.

The fourth OVA about the Kinshu Group ganster syndicate in Kansai region

Taido Kaimon is the leader of the Kinshu Group ganster syndicate in Kansai region. His gang is a cluster of wisecracking madmen, eternally running into trouble with the law, each other, and the local girls who give as good as they get.

The gang hits up a karaoke bar at night only to cause a ruckus with their less than desirable signing. They soon find out the karaoke bar might close from local hooligans and attempt to rescue it for compensation. A fellow gang member gets involved too deep with a woman--even though he's married.

There is a new student at Oobu High School. His name is Yakuda Daigo. With his buff body and a tough-looking face that can make everyone run, soon rumors spread about him. Some say he's a gang leader, others say he is involved with Yakuza business, still more say he rapes, steals, and likes beating people. There are only a handful of people who know who Yakuda really is, including Manami-a. She is a girl Yakuda fell in love with. Yakuda loves to cook and he likes cute things. He also enjoys gardening, crafting and adores pets. He is a very caring person. He always carries around a cute sewing kit and a cute first-aid kit around. However, with many unfortunate events, he often gets involved with a gang fight or a criminal, along with other coincidental things that happens around him. People always assume the worse for him.

The fifth OVA about the Kinshu Group ganster syndicate in Kansai region