Hayakawa Publishing announced that Yomiji Otono’s Boku ga Aishita Subete no Kimi e (To Every You I’ve Loved Before) and Kimi o Aishita Hitori no Boku e (To The Solitary Me That Loved You) sci-fi romance novels are getting anime films to premiere at the same time in 2022. The two novels released on June 23, 2016.
Anime News Network describes the novels as:
Boku ga Aishita Subete no Kimi e centers on Koyomi Takasaki, a boy who lives with his mother after his parents divorce. He attempts to make friends in his new college prep school, but his social awkwardness combined with an atmosphere of focusing on studies means he is unsuccessful. One day, his classmate Kazune Takigawa approaches him, and tells him that she is actually from World Line 85, where she and Koyomi are lovers.
Kimi o Aishita Hitori no Boku e centers on Koyomi Hidaka, a boy who lives with his father after his parents divorce. He meets a girl named Shiori Satō at his father’s research lab, and they begin a relationship that is slowly blossoming into love. But everything changes when their parents decide to marry each other, and they decide to move to a parallel world where they are not stepsiblings.