Dal Ja is 33 years old and still single. She meets Tae Bong who is 6 years younger than her, and works as a substitute boyfriend. While drunk, she makes a deal with him to act like her boyfriend for one month.
Dal Ja and Gae In are lonely women who live alone, dreaming about true love. They both are a bit naive, kind and trusting. And they meet the young, pretty man (Tae Bong and Jin Ho). And now they are supposed to live together. Both Dal Ja's Spring and Personal Preference are romance comedies, with a bit of drama and telling about a real life.