To Your Eternity (Japanese: 不滅のあなたへ, Hepburn: Fumetsu no Anata e, lit. "To You, the Immortal") is a Japanese manga series written and illustrated by Yoshitoki Ōima. It has been serialized in Weekly Shōnen Magazine since November 2016, with individual chapters collected by Kodansha into sixteen tankōbon volumes as of August 2021. The story is about an immortal being, Fushi, who takes on multiple forms, including that of an abandoned white-haired village boy and his white wolf in order to stimulate as it learns what it is to be truly human.

Ōima, inspired by her own grandmother's death, aimed to write about survival and the character Fushi, who initially is an emotionless stone but gradually develops a self and personality as a result of interacting with humans, young and old alike. In contrast to her previous work, A Silent Voice, To Your Eternity puts little focus on the cast's past but instead, upon the future.

To Your Eternity has been well received in Japan, earning many awards and major sales. Critical response to the series debut was positive, based on the emotional focus on the villagers and Fushi to the point of often earning perfect scores. Despite some skeptical commentary on subsequent chapters lacking the same impact, Fushi's continuous character arc was praised while Ōima's artistry enjoyed positive reviews due to its detailed facial expressions and environments. An anime television series adaptation of the manga, produced by Brain's Base, aired from April to August 2021 on Japan's NHK Educational TV; a second season produced by Drive will premiere in October 2022. In North America, the manga is licensed by Kodansha USA for a digital and printed English release.