Love on Sunday: Last Words (2007)

Nagisa, a high school student facing a terminal diagnosis, decides to embark on a journey to her childhood hometown without informing her grieving father. As she revisits her past, memories of her first love for Satoshi resurface, intensifying her feelings. However, her return takes a painful turn when she uncovers that Satoshi is involved in an affair with Eriko, a married woman. This revelation forces Nagisa to confront the bittersweet nature of love and loss as she grapples with her fleeting time and the complexities of her emotions.