Sayako Shirai, 35 years old. Married for seven years, she is a full-time housewife and the central figure of her family. She lives with her company employee husband and their daughter, a university student. Having experienced an escalator-style upbringing—attending the same kindergarten from an early age—she later graduated from Aomori Gakuin University and worked as an office lady at a foreign trading company, where she used her fluency in Chinese and other languages as a bilingual speaker. Currently, while devoting herself to raising her child, she enjoys yoga as a way to relax and unwind. Her only personal struggle is her intense libido. Since early in her marriage, she's found it difficult to control her emotions and resist cheating. The most pleasure she's ever felt came from doggystyle sex in an open-air bath—she particularly enjoys sex in liberating environments. Though initially shy about her first adult video shoot, she gradually becomes bolder throughout filming. This release captures her eroticism and personal evolution.