Believers

Believers (ビリーバーズ, Biriibaazu) is a seinen manga by Naoki Yamamoto and is his first weekly serial manga created entirely without the help of any assistants. Believers was first serialized in Weekly Big Comic Spirits between May and November 1999 and is published in two tankōbon by Shogakukan.

Plot
On a small island somewhere near Japan, three cult members have devoted themselves to the "Deserted Island Program". Calling each other by rank, these people-two men and one women-have been chosen by their superiors to throw off the corrupt influence of modern society and "purify" themselves. But as time passes two of the members begin to give into human desire...