Note: the title was changed from "Sacred Lineage" to "Sacred Virth" in 2016. There existed a sword of light that possesses unlimited magical power, Arv. Arv belonged to Arkthrone Kingdom, but due to the king's sudden collapse, the kingdom started to lose its power. Seeing the opportunity, a sorcery organization by the name of Gatea attacked Arkthrone for the possession of Arv. However, Gatea and Arkthrone's battle became a stalemate. During that time, Forneus, a sorcerer from Gatea, learned the existence of Princess Tierna who had fled to human world for refuge. Forneus attempted to abduct her and use her against Arkthrone, but when he arrived at the human world what he found was a mysterious transformed heroine that stood against him. 「I am the Silver Guardian, Sacred Claire! 」The warrior declared her name, and despite the amount of plans that Forneus had prepared, he suffered a great defeat. So, Forneus transferred to the school to learn about the princess's whereabouts while formulated his plan to fight. He found the weakness of Sacred Lineage using "humiliation guerilla". But right before Claire was defeated, another transformed heroine appeared. However, Forneus also planned to conquer her later on as well. The holy warriors experienced repeated humiliated defeat. In the end, will the young girls bound by chains of pleasure be able to prevail and bring the hope back?