TOTTE-128 Beach gal Ruka takes anal wrinkle check challenge for 30,000 yen prize

A woman named Ruka, described as a beautiful older sister with H-cup breasts, is approached on the beach during summer vacation. She agrees to an anal wrinkle check challenge for a 30,000 yen prize, and the staff oil her body, expose her anal creases to sunlight, and count the wrinkles with a cotton swab. She gets fingered, squirts, and then has sex with a big dick.