It was five years ago in winter when I was unfaithful. At that time, my husband's affair was discovered and I was engulfed in indescribable loneliness. Whether he knew or not about my heartbreak, my son's friend, Sho-kun, confessed his feelings to me. Although I knew it was unforgivable, every time an older boy demanded my body, the guilt within me was drowned by an overwhelming and vivid pleasure... As she spent the whole day justifying her actions, saying, 'I will only play with fire once', she found herself loving him more and more...