Sacrifice Body ~Kodai Meikyuu ni Fuujirareta Kindan no Nikutai Kaizou Hijutsu~

It was known as The Grave, an ancient labyrinth in which a forbidden art was sealed. Seeking treasure and fame many adventurers entered, never to return. What happened to them? Long thought defeated, a trio of heroines have been collected by a mysterious figure called the Grave Keeper in a stony prison deep inside labyrinth: Sharqua the female Knight of Prauha Kingdom, Birgitta the Believer of Sophia, and Catelina "Catcha" the Summoner...