**あらすじ** 人々が少しだけ違う並行世界間で日常的に揺れ動いていることが実証された世界――両親の離婚を経て父親と暮らす日高暦（ひだか・こよみ）は、父の勤務する虚質科学研究所で佐藤栞（さとう・しおり）という少女に出会う。たがいにほのかな恋心を抱くふたりだったが、親同士の再婚話がすべてを一変させた。もう結ばれないと思い込んだ暦と栞は、兄妹にならない世界に跳ぼうとするが……彼女がいない世界に意味はなかった。『僕が愛したすべての君へ』と同時刊行 **Synopsis**: In Hidaka Koyomi’s world, travel between slightly different alternate universes is commonplace. After his parents’ divorce, Hidaka now lives with his father. One day, he falls in love with a girl named Satou Shiori after meeting her at his father’s workplace. Unfortunately, their young love seems doomed as their parents are getting remarried…to each other. Is there some parallel world out there where these two can be together as lovers, not step-siblings…and what could be the price if they try to find out? To Every You I’ve Loved Before and To Me, The One Who Loved You are parallel universe novels by the same author and released on the same day. They can be read in either order to complement each other, and inspired a pair of anime films (also released on the same day).