Mai, a timid first-timer, visits Mizuryuu Kei Land, a hedonistic theme park where societal morals are discarded in favor of raw instinct. Guided by her more experienced friends, Mai navigates the park's provocative attractions and discovers her own hidden lewdness. After a series of passionate encounters, she forms an unexpected emotional bond with a fellow visitor, finding a rare romantic connection in a place designed solely for lust.
Yuka, a member of the "Horny Sentry" idol group in Mizuryuu Kei Land, is known for her stoic demeanor and perceived lack of passion during sexual performances. However, after a surprising encounter with a fan during a handshake event, Yuka discovers a hidden side of her own desires. Following a private, intimate encounter with the boy, Yuka embraces her lewd instincts and returns to the stage with newfound enthusiasm, delivering an extreme performance that shocks and thrills her audience.