Korean Drama5:My Girlfriend is a Nine-Tailed Fox

My Girlfriend is a Nine-Tailed Fox is one of my favorite Korean Drama that I have watched in last summer  vacation.   The story is generally about a love story between a man and a nine-tailed fox and how he helps her to get rid of her tails and become a human.

Cha Dae-woong, the male character,  accidentally releases a troublesome Gumiho, a legendary fox with nine tails, sealed inside a painting by Grandma Samshin. The fox is, in fact, a kind and nice one who's trying to be a human being, but Dae-woong, at first, was afraid of her because rumor has that nine-tailed fox liked to eat the livers of humans. Yet, everytime when Dae-woong was in great peril, and even was going to lose his life, the fox always went and saved him by giving him "fox marble" which is the symbolic of fox's energy. Gradually, Cha Dae realized Gumiho was not evil creature, he fell in love with her and would like to help her out to change her into a human being.  He  stays with her and he tries to keep her happy, while hiding her true identity as a gumiho from all others by having her pose as his human girlfriend Mi ho.
As the story unfolds, Mi ho  pursues her goal of becoming human. Park Dong Joo who was  the half-human, half-monster informing her that to do so, she must drink human blood and allow a human to keep her fox marble inside their body for a full 100 days. Yet, Dong Joo did not mention that at the end of the 100 days the human will die. Loving each other deeply, yet, they do not know the consequence of fullfilling Mi ho's dream of becoming a human being.
I do not know if the ending is counted as happy one or sad one because Mi ho did not successfully become a "real" human being but there was still one tail left. But, finally, Cha Dae-woong could finally be together with Mi ho. I just wonder since Mi ho was still a "one -tail" fox, can they have baby after they get married? Then, will they be able to live together forever since Mi ho always remains to be young and Cha-Dae-woong, just like our human being will die in the end. Those are my questions that bumped into my mind when I finish watching this drama. lol