Nagasarete Airantō

Nagasarete Airantō (ながされて藍蘭島, Nagasarete Airantō, literally Cast Away... Airan Island) is a Japanese manga series by Takeshi Fujishiro. It was first serialized in Square Enix's Monthly Shōnen Gangan magazine in January 2002. A few years later, a couple of drama CDs were released based on the manga version. A 26-episode anime adaptation by the animation studio Feel aired in Japan between April 4 and September 26, 2007.

From the same author, there is a sister series titled Cahe Detective Club which features the cousins of certain characters from this series.

Plot
The story revolves around Ikuto Tōhōin, a 14-year-old boy. At odds with his father, Ikuto ran away from home. He later boarded a cruise ship; the ship is suddenly hit by a huge storm, throwing Ikuto overboard. After drifting out at sea for a week he is found by a girl, Suzu, who after giving him CPR, soon learns that he is on an uncharted island called Airantou (藍蘭島, literally "indigo orchid island") populated by girls. Ikuto finds himself to be extremely popular on the island, because no other men currently live there when a tsunami had swept them all away twelve years ago. As a result, nearly the entire island starts pressuring Ikuto to become their husband—except Suzu. Suzu's extremely old grandmother decides that Ikuto should live with Suzu for the time being. Meanwhile, Suzu does her best to protect Ikuto from the masses. However, Ikuto still does not want to stay on the island, he attempted to leave, but discovers the island has no modern technology and is completely surrounded by whirlpools, eliminating escape by sea or air, thus impossible to leave. With no other choice, Ikuto starts to settle into life on the island.