聖戦姫ヴァルキュア・シスターズ～淫闇に堕ちたアイドル～

The popular idol duo, W's profile was shrouded in mystery, but their true identity was none other than the Valkyria Sisters, princesses of the Kingdom of Light who fled to the human world due to the invasion of the dark world!
The protagonist, a young and inexperienced photographer named Masaki, accidentally discovers the sisters' secret. Together, the three of them team up to battle the evil organization called Gartlrada but...