Shion was found abandoned with a cat and raised as a child by the Fujisaki family. When she becomes a high school student, a traffic accident brings back her memories of the time she spent with a cat, and she decides to search for her whereabouts. Eventually, Shion arrives at Siebold, a cat shelter run by a single woman.
Keita Ueda, an elementary school teacher, reunites with his childhood friend Hikaru Matsumoto, now a pastry chef. As they collaborate on a school project, their shared memories and love for sweets rekindle old feelings.