Popular series featuring the discovery of the Spence mammary zone as a new erogenous zone welcomes Itsukai Mei, whose stunning slender body is breathtaking once she undresses. The Spence mammary zone refers to the so-called G-spot of the breasts, guiding you into a new world of pleasure developed by experts in Spence mammary research. To achieve her first-ever orgasm through breast stimulation, Mei undergoes intense mammary gland development massages that twist her body, leading her to scream, convulse, and climax repeatedly. During prolonged Spence sex focused on teasing her nipples, her sensitivity shatters, resulting in consecutive squirting orgasms. When her mammary glands are stimulated with toys, drool drips uncontrollably from her mouth, her legs tremble violently, and she loses so much fluid through involuntary urination that her body seems completely drained. Through relentless nipple torment and full awakening of her mammary glands via Spence intercourse, she is driven to overwhelming, consecutive peaks of ecstasy.