While Gray and Lyon go to high school they've always competed with one another as rivals-even though they were once friends. But when a pair of twins comes into their school they make a bet to see who they get to love them first. Juvia and her little twin sister Julia transfers schools after a terrible accident happened with her younger sister that forced the two of them to move. Instantly Juvia finds herself in love with one of her class-mates, can she focus her attention on both her little sister and her crush or will her younger sister be left behind?