Erina Masuda

High School student Miyui Mashio is really struggling. She can't fulfill her dream of becoming an idol and her parents are always fighting. Suddenly, she finds a genie in a bottle and through an accident, finds herself back in 1991. She realizes she is now going to school with her parents. But the problem is, her parents do not seem to get along - so Miyui will never be born! Miyui learns her father is interested in idols and so together with her mother and other girls she forms the idol group AGS16 to make sure her parents will eventually fall in love.

65 million years ago, the knights of the Ryusoul Tribe were selected to participate in a war campaign against the dictating Druidon Tribe who sought to rule Earth. But the Druidon's war campaign was halted by the meteor that brought the age of the dinosaurs to an end, forcing them to flee into space. Meanwhile, the Kishiryu were placed in a deep sleep as a failsafe should the Druidon return. The chosen knights choose to live in peace while passing their mantle down across generations. In the present day, the Druidon return to reclaim Earth as the current generation of knights, the Ryusoulgers, battle them with the support of Ui Tatsui and her father Naohisa Tatsui.

Tetsu Himokura is a parasitologist. He enjoys researching the lives of parasites at his home laboratory and he barely leaves his home. He also has assistant Haruma Takaie to help him. Tetsu Himokura's right hand is a robotic prosthetic hand. He is very smart, but blunt to others.

Born in a family of delinquents, Nanba Tsuyoshi is expected to succeed as the strongest delinquent in school. Unbeknownst to his family however, he decides to enroll in the top high school in town to live as a normal high schooler. Can he maintain his double life as the strongest delinquent in town and as a normal high schooler?

The story is set in a big hospital which is infiltrated and taken over by an armed group wearing devil masks. Musashi Saburo a police officer on leave of absence has to save the hostages within a set time limit.