It was the winter 5 years ago when I was unfaithful. At that time, my husband's affair was discovered and I was plunged into indescribable loneliness. Whether he knew or not heed my heartbreak, my son's friend, Sho-kun, confided in me. Even though I know I can't forgive, every time a boy older than me demands my body, my sense of guilt is drowned out by a strong, blue pleasure... When she spends the whole day making excuses like, 'I'll play with fire just once', she feels more and more in love with him...