Kara is human. Barry is human. They all live on one earth. Oliver is Mayor and The Green Arrow- Kara and Barry know. Barry is married to Iris and Kara is engaged to Mon el. Kara and Barry are soldiers and they are finally coming home. Barry and Kara have an amazing friendship, Iris was worried at first and, not so subtly, inquired about their relationship. Barry and Kara confirmed that they aren't in love with each other but they are SUPERFRIENDS! But what if someone else is in love with Kara? Will he not say anything? Or will he tell her? Or will he be confronted?