Akira Tachibana is a seventeen-year-old high school student whose promising future as a track and field star was cut short by a serious injury to her Achilles tendon. Struggling to fill the void left by the sport she loved, she takes a part-time job at a cozy family restaurant called Garden to give her days a new structure and purpose.

It is there that she becomes drawn to the restaurant’s gentle and somewhat bumbling forty-five-year-old manager, Masami Kondo. On a rainy day when she was feeling particularly low, Kondo offered her a kind word and a free cup of coffee, a small gesture that left a profound impression on the reserved teenager. While her classmates see him as an unremarkable, middle-aged man, Akira sees only his quiet sincerity and dedication to his work. She soon finds herself falling in love with him, a feeling that confuses her as much as it excites her.

Unable to contain her emotions any longer, Akira confesses her feelings to Kondo directly. The manager, a divorced father who has long since accepted a quiet, unambitious life, is baffled by her confession and initially dismisses it as a childish crush. He gently but firmly tries to let her down, pointing out the absurdity of their age gap and the impossibility of a relationship. However, Akira is surprisingly persistent and honest about her feelings. She refuses to let him simply brush her aside, arguing that one cannot help who they fall in love with. Eventually, Kondo agrees to a tentative friendship, though he remains deeply uncomfortable with the power dynamic and the implications of her affection.

Their connection forces both characters to confront their own stagnation. For Kondo, Akira’s youthful admiration becomes a mirror reflecting his own lost dreams of being a writer, pushing him to rediscover a sense of purpose he thought he had lost. For Akira, navigating her feelings for Kondo coincides with a challenge from a younger, ambitious runner, Mizuki Kurata, who threatens to surpass her old records. This rivalry reignites Akira’s own buried passion for running, forcing her to decide if she is truly ready to leave her athletic past behind.

In the end, the story is less about a conventional romance and more about two people at crossroads in their lives finding solace in an unexpected friendship. As the rain that symbolizes their melancholy begins to clear, Akira decides to return to the track to reclaim her own future, while Kondo finds the courage to pursue his literary aspirations. Their relationship does not culminate in a dramatic affair, but rather in a mutual understanding that helps them move forward, suggesting that some connections, no matter how unusual, arrive exactly when they are needed to help the sun break through after the rain. Alongside the main film, a four-episode spin-off miniseries titled Koi wa Ameagari no You ni: Pocket no Naka no Negaigoto focuses specifically on the developing relationship between Akira’s classmate Takashi Yoshizawa and her bubbly coworker Yui Nishida.