Marionette Zero

Several thousand years ago, a secret plan called "Heaven's Stone" was carried out. A "Heaven's Stone" was an artificial stone created by extracting a special power out of a certain stone. As a result, an unexpectable phenomenon happened and some reinforced their bodies and some felt no pain. Therefore, only a few people were allowed to carry the stone. However, a dreadful plan was being proceeded underwater.... [From [url=https://web.archive.org/web/20090305035635/http://www.erogeshop.com:80/product_info.php/cPath/146_50/products_id/1010583]Eroge Shop[/url]]