I will introduce you to my casual partner. Sana-chan is a 23-year-old high-spec beauty from Minato-ku, with model-level style, working at a high-end cabaret in Roppongi. At the shop, she's the number one girl, rolling around men from Minato-ku who wear luxury brands in the palm of her hand every day. However, even she gets stressed and contacts me, seeking raw, unbridled sex without any games or rubber. I can't let go of this best casual partner.