Ikuto Touhouin, a young boy, is swept overboard during a storm and finds himself stranded on a mysterious island called Airantou. The island is inhabited solely by women, all descendants of a group who were shipwrecked centuries ago and have since lived in isolation. The island’s population is governed by strict traditions, including a rule that any man who arrives must marry one of the island’s residents. Ikuto’s arrival disrupts the peaceful but insular lives of the islanders, as he becomes the center of attention and the subject of various romantic pursuits.

The island’s inhabitants include Suzu, a kind and gentle girl who takes an immediate interest in Ikuto; Ayane, a tomboyish and energetic girl with a competitive streak; Rin, a quiet and reserved girl with a mysterious past; and Machi, a mischievous and playful child who often causes trouble. Each character has distinct traits and backstories that contribute to the dynamics of the island’s society. Ikuto’s presence challenges the status quo, as he navigates the complexities of the island’s traditions while trying to find a way to return home.

Throughout the series, Ikuto interacts with the island’s residents, often finding himself in comedic or awkward situations due to the cultural differences and the islanders’ unfamiliarity with the outside world. The narrative explores themes of community, tradition, and the clash between old and new ways of life. As Ikuto bonds with the islanders, he gradually becomes more integrated into their society, though his desire to return home remains a central conflict.

The series balances lighthearted humor with moments of introspection, as the characters confront their feelings and the challenges posed by their isolated existence. The island itself is depicted as a lush, idyllic setting, with its natural beauty contrasting with the rigid social structures that govern its inhabitants. The interactions between Ikuto and the islanders drive the plot, with each episode offering a mix of comedy, romance, and occasional drama.

Ikuto’s journey is marked by his growing relationships with the island’s residents, particularly Suzu, whose kindness and determination make her a central figure in his life. The series also delves into the histories of the other characters, revealing the reasons behind their behaviors and the traditions that shape their lives. As Ikuto learns more about the island and its people, he begins to question his own desires and the possibility of finding a place where he truly belongs.