Post war Japan is at its lowest point when a new crisis emerges in the form of a giant monster, baptized in the horrific power of the atomic bomb.

Um universitário é capturado pela SHOCKER, uma organização visando a dominação mundial, para ser transformado em um ciborgue a seu serviço. Porém, ele consegue escapar e, como Kamen Rider, usará suas novas habilidades para tentar detê-los.

Mana Kotani was friends with Sumire Utsuki for years. She admired Sumire's freewheeling ways and mysterious charm, but Sumire broke off connections with her. Later, Mana hears of Sumire's death, which she cannot get over.

A school appears peaceful from a distance, but a fierce gambling battle takes place once again. Yumeko Jabami is involved in the battle.

In 1933, a young naval officer and math prodigy uncovers a conspiracy regarding the construction of Japanese warships for the ongoing World War 2.

Hyakaou Academy is an institute where the academic ranking is based on the pupils' gambling winnings. Yumeko is new to the academy. Her pretty enchantress looks are only surpassed by her voracious appetite to gamble it all and win it all.