Yeon Seo and Dan go on a picnic to the park where they first met. Yeon Seo wants to marry Dan because she thinks it is the only way for them to be together. Meanwhile, Dan falls down and gets hurt in the park, but his wound doesn’t heal itself as usual. They think this is a symptom of becoming a human and they wait for a rainy day to check if it’s real. (thetvdb.com)