Gift Eternal Rainbow

Summary: 

    Set in a town where an eternal rainbow hangs over it's denizens and grants them the gift of magic in which when two hearts are one, anything the Giver wishes for will come to pass. Haruhiko Amami faces an emotional struggle when his non-related foster sister Riko Fukumine returns to his town after many years of seperation. A tangle of crushes and hopes also serve to compound matters further.