To Every You I’ve Loved Before

Old Koyomi Takasaki Tokuma Nishioka notices a note from his IP device informing him about a meet-up at 10 AM today, August 17, but he cannot recall it. After being encouraged by his wife Kazune Kimiko Yo to show up at the meeting place, Koyomi arrives at the Showa-dori intersection and meets the ghost form of Shiori Satō’s Imaginality, her consciousness, who is waiting for him. After she disappears, Koyomi deduces that a shift to a parallel world, called Parallel Shift, has taken place, but his IP device shows an error message upon checking it to determine how far he is from the original world.

In a parallel world, seven-year-old Koyomi chooses to live with his mother Mayumi Takasaki after his parents got divorced. Following the death of his grandfather, Koyomi walks his dog Yuno outside when he suddenly experiences a Parallel Shift. He encounters young Shiori who then runs away and finds himself at Imaginary Science Research Institute where his father works. Arriving at his mother’s house, Koyomi realizes that he is in a different world where he has chosen to live with his father, his grandfather is alive, and Yuno has passed away. After staying for a night, Koyomi returns to his original world.

Now a high school student, Koyomi is approached by his classmate Kazune Takigawa, who introduces herself as his girlfriend in the 85th parallel world. Kazune reveals that she has not felt a Parallel Shift taking place despite her IP device reading her world is 85 shifts away. They decide to continue their everyday lives on their own. Sometime later, Koyomi greets Kazune with her first name but gets ignored instead, resulting in him believing that the Kazune of the 85th parallel world has returned home. Koyomi invites the original Kazune to a karaoke to learn about her experience when she was in the 85th parallel world, but Kazune reveals that she has pranked him about being his girlfriend and her shifting to the other world as payback for making her speak at their school’s opening ceremony instead of him. Since then, Koyomi and Kazune become friends, with her rejecting him during his confessions. After graduating and enrolling at the same university, Kazune asks Koyomi to be his girlfriend. Afterward, the two join the Institute and help in improving the reliability of IP devices.

Koyomi and Kazune get married and have a son named Ryō. An attacker causes havoc at the exhibition that the Takasaki family is visiting, but Koyomi manages to save Kazune and Ryō from the attack. Going back to work, Koyomi learns that an Optional Shift, a forced Parallel Shift to a specified parallel world, targeting Kazune has taken place. It is revealed that his Kazune has shifted to another world and the current one is from the 13th parallel world where her son has died from the attack. That Kazune returns to her world after coming to terms with her son’s death, but Koyomi’s Kazune is no longer “numerically” the original one due to identity diffusion. Despite all that, their love continues until their old age.

Old Kazune Takigawa from the parallel world where she and Koyomi, named there as Koyomi Hidaka, are not married initiates an Optional Shift to the old Kazune of this world to write a letter asking her to send her husband to the intersection to fulfill Hidaka’s wish of meeting with Shiori again at the same place. Takigawa reveals that Hidaka has just gone through Time Shift and his Imaginality resides in her husband’s consciousness. Back at the intersection, old Koyomi encounters old Shiori, both are not recognizing each other, and he hears that she is living a happy life. Koyomi returns home and shows Kazune his gratitude for making his life happy.

Last Updated: October 01, 2025 at 10:23