Reiko Biker follows the tale of a women biker, Reiko, that embarks on a trip full of erotic experiences and adventures. Gamers take on the role of Reiko's companion, participating in specific sex-related tasks and discovering their wildest dreams. The video game's story is focused around Reiko's sex-related ventures, with each experience providing a distinct collection of challenges and rewards. Gamers should browse through various obstacles and choices to progress through the tale and unlock brand-new sex-related experiences.