"Natsuyuki Rendezvous" is a manga series that blends romance, drama, and supernatural elements. 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, Ryosuke decides to take a part-time job there to be closer to her. However, his pursuit of Rokka is complicated by the presence of her late husband, Atsushi Shimao, whose ghost still lingers in the shop and their home. Atsushi, invisible to Rokka but visible to Ryosuke, is unwilling to let go of his wife and actively interferes with Ryosuke's attempts to win her affection.

As Ryosuke grows closer to Rokka, Atsushi's ghost becomes increasingly possessive, leading to tension and emotional conflict. The narrative explores themes of love, loss, and the difficulty of moving on from the past. Ryosuke's persistence and genuine feelings for Rokka are tested as he navigates the complexities of her grief and Atsushi's lingering presence. The story delves into the emotional struggles of all three characters, highlighting their vulnerabilities and the ways they cope with loss and longing.

The relationship dynamics shift as Rokka begins to open up to Ryosuke, and Atsushi is forced to confront his own unresolved emotions. The series examines the boundaries between the living and the dead, as well as the impact of memory and attachment on personal growth. Through its exploration of love and grief, "Natsuyuki Rendezvous" presents a poignant and introspective narrative that balances moments of tenderness with the challenges of letting go. The characters' journeys are interwoven with themes of healing and the possibility of new beginnings, even in the face of profound loss.