"Natsuyuki Rendezvous" is a romantic drama anime series adapted from the manga by Haruka Kawachi. The story centers on Ryosuke Hazuki, a young man who becomes infatuated with Rokka Shimao, the owner of a small flower shop. After frequenting the shop to buy flowers, Ryosuke decides to take a part-time job there to be closer to her. However, his attempts to pursue a relationship with Rokka are complicated by the presence of her late husband, Atsushi Shimao, whose ghost continues to linger in the shop and their home. Atsushi, invisible to Rokka but visible to Ryosuke, is unwilling to let go of his connection to his wife and becomes a persistent obstacle in Ryosuke's efforts to win her affection.

As Ryosuke grows closer to Rokka, Atsushi's interference intensifies, leading to a series of emotional and supernatural conflicts. The narrative explores themes of love, loss, and the difficulty of moving on from the past. Ryosuke's determination to build a future with Rokka is tested by Atsushi's lingering presence and the emotional baggage both Rokka and Atsushi carry. The story delves into the complexities of their relationships, blending moments of tenderness with tension as the characters navigate their intertwined fates.

The series is characterized by its focus on character development and emotional depth, with Ryosuke, Rokka, and Atsushi each grappling with their own vulnerabilities and desires. The interplay between the living and the spectral creates a unique dynamic, highlighting the challenges of forming new connections while honoring the past. "Natsuyuki Rendezvous" offers a poignant exploration of love and grief, set against the backdrop of a quiet, everyday world infused with supernatural elements.