>>101253912Ending 1: Girl A dies. Girl B comes on to him. He turns her down out of his love and mourning for Girl A.
Ending 2: Girl B dies. Girl A comes on to him. He turns her down out of his love and mourning for Girl B.
Ending 3: They save the day without a tragic death and go out for drinks as friends.
There's more actual story differences, but that's the gist of the romantic resolutions.