Yui Kawai begins filming what she believes to be a "hardcore orgasm sex" scene, but secretly, she's been assigned a "120-minute nonstop sex" challenge. Unaware of the true plan, she's thrust into intense sex and pushed to climax after climax. However, the real nonstop pleasure has only just begun. Without a moment's rest, she's relentlessly tormented with electric vibrators and dildos, penetrated by multiple men one after another. She's made to climax repeatedly in various positions—public masturbation, standing doggystyle, forceful cowgirl, and more—reaching orgasm over fifty times. Even as she loses consciousness, she's driven further and further into the ultimate depths of pleasure.