I loved this manga. It has become one of my most favorite and the ending was just too hilarious... The story was so well written that I couldn't even go to sleep without finishing it. What was mentioned before is indeed true that this story could have been a drama. This manga also reminded me of the Indian film, "Kama Sutra: A Tale of Love," a bit.
Kinpeibai Kinden Honoo no Kuchizuke