From what to wear the dress in the style of lingerie? How to wear a brooch and a cap?

As first seen on blog "Ksenia Nova" here: From what to wear the dress in the style of lingerie? How to wear a brooch and a cap?

She is wearing tights similar here: Black Super Opaque Tights
Update your wardrobe with colorful opaque tights. Smoothes your tummy with the control top. Comfortable wide waistband and durable reinforced toes 90 denier, opaque stretch nylon.