Spence Breast Gland, the G-spot of the breasts, is intensely stimulated to deliver powerful orgasms—this is the sensational series. This time, popular actress Ai Sayama appears exclusively in the series. Initially skeptical and disbelieving of the existence of the Spence Breast Gland, she instantly experiences overwhelming pleasure upon first stimulation, losing control and involuntarily urinating. "No, no!! Doctor! I'm coming again!!!" Despite being her first time, she writhes repeatedly in ecstasy deep within her chest, until finally convulsing and collapsing into a dazed, trance-like state. Witness Ai Sayama's most extreme orgasmic experience yet.