1x28 - Angel's Last Mission: Love

Kang Woo tells Yeon Seo that it will be meaningless to Dan if she doesn’t exist in this world, and she notices that she should die in order to save Dan. Ni Na announces to her family that she will live by herself from now on, and Ru Na gets furious. Meanwhile, Dan and Yeon Seo’s wedding day comes, and they make a vow of their eternal love.