Couples was living happily . Three years almost completed of their togetherness . On the day of their marriage anniversary , the male lead character came to know about butterflies clan and during that time he came to know that his wife was among them . He tried his best to save his wife but he can't . So only option had remained ....I don't want to be spoiler so would not write much .
The last part of second last episode when the bell rang she turned and smile. So as viewers we assumed that he came back .
In last episode was not continued with the last part of 19th episode .
It was shown that they were living happily and were doing all types of house chores . And in the end it had shown that she was sleeping and suddenly wake up and saw his husband with a doubt so it felt like that she was seeing a dream ,that means till now what had happened with her was not real . It was her dream. Last part confused me a lot.
In the drama time to time it had shown two couples that how they met ,then they married and they had a daughter . That small story I liked it.