One day, Ikuto has a fight with his father and as a result runs away from home in the heat of the moment. Everything was going well until he boarded a ship, but then he carelessly fell overboard. After encountering the most serious raging storm in a hundred years, and spending many days adrift, he arrives here, at "Airantou". However, this island is a little weird...because, this Airantou is an island comprising solely of girls. An (extremely enviable) destiny awaits Ikuto. 不擅于和女孩子相处的少年东方院行人,跟父亲吵架之后,一气之下离家出走.在搭船展开新生活的途中,却遇上了百年一次的暴风雨而漂流到一个怪异的小岛—— 蓝兰岛上."这个岛上只有女孩子!"个性长相都截然不同的美少女们,身为岛上唯一的男孩,他们之间会发生什么有趣的事呢?故事中的蓝兰岛是130年的一个无人岛屿.一艘欧洲客船曾在此处遇难,部分获救的船员登陆到小岛上过起了自给自足的生活.然而12年前的一场意外导致于岛上仅剩下了女性...这场意外真的仅仅是灾难吗?