Stairway to Heaven 1x13

Mi Ra suggests that Jeong Seo gets married to Cheol Su at dinner with Song Ju. Song Ju gets drunk after dinner and finds Jeong Seo on his way home. Song Ju makes Jeong Seo go stay at the cabin where Cheol Su is. In the cabin, Jeong Seo falls sick, and Cheol Su leaves her after calling Song Ju.