Bras, shorts, garters, etc. Karen Yuzuriha, a designer at a high-end lingerie manufacturer, isn't satisfied until she tries out the new prototypes herself! During the fitting, her prey is a male employee. She has a test mating session to inspect the products! A titty fuck with a stronger grip while still wearing the bra! A slip-up where the friction of the shorts creates sexual stimulation! A groundbreaking lingerie that doesn't get dirty even when creampied! She devours men with her big breasts, beauty, and lustful inspiration!