Follow the journey of a lucky protagonist as he travels to secluded, secret hot springs all over Japan with the sole purpose of sexual conquest. In each episode, he discovers a new steamy spa run by incredibly beautiful and horny women, often a busty mother and her nubile, eager daughter. He wastes no time seducing them both, leading to incredibly lewd and taboo encounters. Watch as he fucks them senseless in the milky, warm waters of the onsen, filling their pussies and mouths with his cum. The series is a showcase of debauchery, featuring intense mother-daughter threesomes, outdoor fucking, creampies, and incestuous passion, as our hero relentlessly pleasures every woman he meets on his secret hot spring tour.