"Hidamari Sketch: Sae & Hiro Graduation" is a two-part original video animation (OVA) that serves as a continuation of the "Hidamari Sketch" series, focusing on the lives of the students at Yamabuki Arts High School. The narrative centers on Sae and Hiro, two third-year students who are preparing to graduate, marking a significant transition in their lives. The story explores their final days at the Hidamari Apartments, where they have lived alongside their friends Yuno, Miyako, Nazuna, and Nori.

The first part of the OVA delves into the daily routines and interactions of the characters as they navigate the emotional weight of impending graduation. Sae, an aspiring novelist, reflects on her growth and the friendships she has cultivated, while Hiro, the nurturing and responsible figure of the group, supports her friends while grappling with her own feelings about the future. The narrative captures the bittersweet atmosphere of their final moments together, blending lighthearted humor with poignant reflections on change and personal growth.

The second part shifts focus to the graduation ceremony itself, highlighting the culmination of their high school journey. The story emphasizes the bonds between the characters, showcasing how their shared experiences at Hidamari Apartments have shaped their lives. Yuno, Miyako, Nazuna, and Nori, though younger, play significant roles in celebrating Sae and Hiro's achievements, underscoring the theme of interconnectedness and the passage of time.

Throughout the OVA, the narrative maintains a slice-of-life tone, emphasizing the quiet, everyday moments that define the characters' relationships. The story avoids dramatic conflicts, instead focusing on the emotional resonance of small, meaningful interactions. The OVA serves as a heartfelt conclusion to Sae and Hiro's arc, celebrating their journey while acknowledging the inevitability of change and the promise of new beginnings.