In Japanese, 'love story' is commonly expressed as '銉┿儢銈广儓銉笺儶銉 (rabu sut艒r墨)'. But a more traditional and native way to say it is '鎭嬨伄鐗╄獮 (koi no monogatari)'.
In Japanese, 'love story' is typically expressed as '鎭嬫剾銇┍ (ren'ai no hanashi)'. Different contexts might call for slight variations, but these are common ways to say it.