One great storyline could be the male reader being a new member of Fairy Tail and Millianna immediately taking an interest in him because of his unique magic. She tries to get closer to him by involving him in her cat - loving antics, like taking him to visit all the stray cats in Magnolia. Another could be that the male reader is on a mission to rescue Millianna from a dark guild that has captured her, and during the rescue, they develop a deep bond.
Well, a possible storyline is that the male reader is an amnesiac who ends up in Fairy Tail. Millianna, being the kind - hearted person she is, takes it upon herself to help him remember his past. As they spend time together, they fall in love. Or perhaps the male reader is a mage from a far - off land who comes to Fairy Tail for a tournament. Millianna is his first opponent, but instead of fighting seriously, they end up having a friendly spar and start to like each other.