Yagi Takeru has been living in the Touma family's house since his parents are gone. He was raised by Touma Rokunosuke, the head of the house. He is surrounded by many people such as Yamato Takeshi, his best friend-cum-rival from the kendo club, the Shiratori sisters, Kotono and Asuka, and his childhood friend, Oosu Seri. Life has been blissful until one day, an earthquake strikes the school and everything changes. Takeru awakens to find that the school looks as if it has been abandoned for centuries and reduced to ruins. He also realize that all the teachers and students have disappeared as well. He meets up with Seri and Asuka and they fled from the ruins, only to realize that the town they used to live in is completely empty. Subsequently, people wrapped in cloaks appear before him. They were told that they have been brought to another world.

Takeo Watta inherits a company upon his father's death. The company focuses on space travel, and the transformable robot Trider-G7 is their greatest creation. When an evil space organization lead by Lord Zakuron starts attacking Earth, Watta has to use Trider in a more combat-oriented way.

Fifth season of .

Kunyan lives her crazy life of misadventures from episode to episode. This comedy series is accompanied by a narrator who scientifically explains all that happens to her.