Boku ga Aishita Subete no Kimi e

Parallel worlds are not theory in Koyomi Takasaki's society; people can drift between neighboring realities as naturally as circumstances change. After his parents divorce, Koyomi stays with his mother and enters a demanding preparatory school, where his reserved personality leaves him isolated. Then classmate Kazune Takigawa approaches him with an impossible claim. She says she has shifted from World Line 85, a reality where she and Koyomi are already lovers. Her story forces him to question whether the boy she remembers is truly the same person standing before her. As their relationship grows, countless nearby worlds offer different versions of the lives they might share, making love a question not only of choice, but of which reality those choices create.