著書『婚外恋愛成功の秘訣』の紹介 https://furin-note.com/%e8%91%97%e6%9b%b8%e3%80%8e%e5%a9%9a%e5%a4%96%e6%81%8b%e6%84%9b%e6%88%90%e5%8a%9f%e3%81%ae%e7%a7%98%e8%a8%a3%e3%80%8f%e3%81%ae%e7%b4%b9%e4%bb%8b/