The series follows a lucky man who wins a trip to the titular Mizuryuu Kei Land, a theme park exclusively staffed by hyper-sexual succubi dedicated to fulfilling every guest's deepest carnal desires. Upon arrival, he's greeted by voluptuous guides who lead him through a series of pornographic attractions. His adventure begins with a wild ride on the 'Milking Coaster,' where his cock is relentlessly milked by multiple succubi until he erupts. He then experiences the 'Pheromone Perfume' attraction, getting sprayed with potent aphrodisiacs before being led into a private room for an intense gangbang with several eager succubus girls, who take turns riding his throbbing erection and swallowing his seed. Each episode introduces a new, more depraved attraction, from deep-throat training facilities to creampie-focused water slides, culminating in a final orgy where the park's queen herself drains him completely in a marathon fucking session, ensuring he leaves utterly satisfied and completely drained of cum.