When Barry accidentally gets stuck on Earth 3 again and requires Kara's help to get back, she agrees on one condition. He'll take her with him to go visit his friends on Earth 1. Luckily for Team Flash, they have Supergirl to help them deal with a dangerous villain. Will Barry and Kara come out as good friends, or maybe something more? Also posted on Fanfiction.net under Annie's account, tundralights (to prevent confusion)
14 parts