Ryôji Nakamura

The film's story revolves around Asakusa-born-and-raised Gen, who helps out at his family's strip club. With his friends Makoto, Jimmy, and Mattsun, the four get into fights together, as well as help out with watching out for Gen's family. One night, Gen is told by his father to pick up a woman at the train station. There, he finds the beautiful Chōcho (lit. butterfly), and falls in love with her at first sight. However, he finds out that she is the #1 strip girl in Osaka, and Gen gets eccentric when he finds out that she'll be living in "England Theater," the strip club his father runs.

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.

Eripiyo is initially a woman leading a normal life until it is turned upside down after watching a performance of the minor idol group ChamJam, which leads her to becoming obsessed with one of its members, Maina Ichii. Despite Eripiyo's enthusiasm towards her, Maina is consistently the least popular member of the group, leaving Eripiyo to take it upon herself to buy a lot of Maina's merchandise, which mainly involves singles.