is a Japanese manga series written and illustrated by . It was serialized in Shogakukan's manga magazine Monthly Big Comic Spirits from August 2015 to February 2018, with its chapters collected in five volumes.
Kanon Takatsuki, a shy young woman, has long been in love with her high school senior, Sousuke Sakai. After being rejected when she confesses to him at graduation, Kanon continues to hold onto her feelings even as Sousuke becomes a combat operative for the Alien Lifeform Countermeasures Committee (SLC), an organization that fights extraterrestrial creatures known as "Jelly". Because Sousuke is frequently injured in battle, he undergoes a medical procedure called "Repair", which restores his body but gradually alters his personality and emotions over time.
Years later, Kanon reunites with Sousuke when he visits the pastry shop where she works. As Sousuke's marriage to his wife Hatsuo, an SLC researcher studying the psychological effects of Repair, begins to deteriorate, he grows closer to Kanon and eventually leaves with her. In response, Hatsuo releases captured Jelly specimens, causing a major disaster in Tokyo and forcing Sousuke to return to battle. Due to his repeated Repairs, Sousuke eventually loses his emotional attachment to Kanon, and she leaves Tokyo to move on with her life.
Ten years later, Kanon is working as a pastry chef when Sousuke, now living a different life and having lost his memories, visits her shop. After hearing music that triggers his memories, Sousuke remembers Kanon and calls out to her, and the story ends as Kanon, still in love with him, begins to fall in love with him once again.
Written and illustrated by , Ageku no Hate no Kanon was serialized in Shogakukan's manga magazine Monthly Big Comic Spirits from August 27, 2015, to February 27, 2018. Shogakukan collected its chapters in five volumes, released from June 10, 2016, to June 12, 2018.
Ageku no Hate no Kanon ranked 15th on the "Nationwide Bookstore Employees' Recommended Comics" by the Honya Club website in 2018.