Narumi Koyuki, a 36-year-old married woman, was born in a place with beautiful seas and heavy snowfall. She married her husband, a former classmate from her student days, 12 years ago. With her stunning G-cup breasts, approachable personality, and undeniable charm, she's an attractive woman with a certain allure. Many men were drawn to her charm—she's 'ordinary,' yet 'not ordinary.' Despite this, why did she choose the adult film industry after 12 years of loving her husband and never crossing the line of infidelity...?