Takao Yoshioka (吉岡 たかを, Yoshioka Takao) is a Japanese screenwriter for anime. He also uses the alias Yoshio Takaoka when writing for OVAs, mostly erotic ones.
Immediately following the events of "Ikki tousen: Xtreme Xecutor", the kids from Nanyo Academy head to Kyoto for a school trip. Before long, they run into rival classmates from other Kanto schools and find themselves confronted by Kyoto's best fighters. It's a battle of epic proportions. Hopefully the city of Kyoto will be left standing!
In the near future, Earth is at war with aliens called Worms. The war leaves the population of Earth decimated, with young men the main casualties. The Worms were beaten back but their re-emergence heralds the creation of a mecha unit called the Sonic Divers, piloted by 3 young girls to counter this threat.
In the last chapter of the Refrain Blue series, the bond between Yoshihiro Matsunaga and Nao Morisawa grows stronger, while Yoshihiro finally finds out the identify of the mysterious girl from the first chapter.
The second chapter in the Refrain Blue series focuses on Nao Morisawa and the events that happened at the summer camp last year, with her and Yoshihiro Matsunaga both unable to let go of feelings of the past.
The first chapter of the Refrain Blue series, tells about the recollection of Yoshihiro's past about various events of summer school, of the fate where encounter and separation are interwoven with each other, as Yoshiro and Matsunaga will pass the Toyo Gakuen and will arrive at summer school at seashore. A mysterious girl smiles as she watches Yoshiro who stands still at the seashore dusk.
