Yesterday wo Utatte follows Rikuo, a college graduate working a dead-end job, feeling stuck in his routine. His life begins to shift with the appearance of Haru, a quirky and persistent young woman who wants to befriend him.
Complicating matters is the return of Shinako, Rikuo's former college crush. He sees an opportunity to reconnect with her, but she's burdened by her past.
As Rikuo navigates his feelings for both women, he starts to understand their individual struggles. Haru is trying to break free from her own comfort zone and create a future for herself. Shinako is wrestling with painful memories that hinder her ability to move forward.
The story centers on these three characters as they grapple with the past, uncertainty about the future, and the challenge of embracing change. It explores their intertwined relationships and how they influence each other's journeys of self-discovery and emotional growth.