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. 在海岸沿线有个楢崎町.在这楢崎町有着两个不可思议的现象.一个是绝对不会消失的「彩虹」,另一个则是,在这个小镇诞生的人拥有能一生一次赠与他人礼物,被称为「Gift」的魔法.主人公「天海春彦」是居住在楢崎町的志摩野学园二年生.