Lisanna Strauss had returned from Edolas, the other world. She returned to Fairy Tail, safe and okay. She became close friends with Lucy, and then the guild is obviously happy with that -- until rumors started.
Everyone suddenly bullies the celestial mage, her team kicks her out, which makes her cry, feel lonely, feel like she's useless and weak - she felt anger, sadness at the same time.
She leaves the guild with a certain someone - that is always there for her when she's crying, comfort her, and someone who will love her, with her exceed - that will gain the ability to become stronger, and who will fight for whom they love.
Until, they meet another certain person..