H-cup beauty Hayami Io is summoned to the studio without any explanation. This time, Celeb no Tomo presents a shocking concept: "Immediate Hardcore." Completely unaware of the shoot's content, Io is suddenly confronted by a well-endowed male actor. What begins with her stunned expression gradually transforms as she becomes immersed in the pleasure of big-dick sex. Soon, her massive breasts are vigorously groped and bouncing wildly as she orgasms repeatedly. A project that completely disregards compliance standards, this intense scenario pushes Io's body and mind to their limits.