This is a sweet and warm-hearted drama. Jae In in this version is bad tempred, decisive and cute and a little shy but Jae In in something about 1% (new version) is manly, and he is not childish. Da Da in the old version is traditional girl, she is a teacher and she acts like a teacher but the new Da Da version is a teacher and she acts like the normal girl. This is the reasons why I love the old version so much. I love the actors in the old version more than new version. 1% of anything is kind of family drama, it is long but it is worth watching. I love the dialogues and all characters. And the audiences can learn how to love and care for each other through this drama.