"Tropical Kiss" centers on a young woman named Aoi, who moves to a small coastal town after inheriting her grandmother’s seaside inn. The inn, once a bustling retreat, has fallen into disrepair, and Aoi must navigate the challenges of restoring it while adapting to her new life. The town is vibrant and filled with eccentric locals, including fishermen, artisans, and tourists, each contributing to the community’s unique charm. Aoi’s journey is marked by her interactions with these characters, who gradually become her support system as she learns the intricacies of running the inn.

The plot unfolds as Aoi discovers a mysterious seashell necklace left behind by her grandmother, which holds a connection to the town’s folklore. Legends speak of a mythical sea spirit said to grant wishes to those who prove their worth. This discovery intertwines with Aoi’s efforts to revive the inn, as she uncovers hidden stories about her grandmother’s past and the town’s history. Along the way, she forms a close bond with Kaito, a local fisherman with a deep knowledge of the sea, and Yuna, a spirited artist who helps Aoi see the beauty in the town’s traditions.

As Aoi works to restore the inn, she faces challenges such as financial struggles, seasonal storms, and the skepticism of some locals who doubt her ability to succeed. However, her determination and the friendships she builds help her overcome these obstacles. The narrative explores themes of heritage, community, and self-discovery, as Aoi learns to balance her ambitions with the needs of the town. The seashell necklace serves as a recurring symbol, tying together the past and present, and hinting at the possibility of a deeper connection between Aoi and the mythical sea spirit.

The series balances slice-of-life moments with elements of magical realism, creating a story that is both grounded and enchanting. The coastal setting is integral to the narrative, with the ocean serving as a backdrop for key events and emotional revelations. Through its exploration of Aoi’s journey and the town’s rich culture, "Tropical Kiss" offers a heartfelt portrayal of perseverance and the importance of preserving traditions while embracing change.