Taking an ordinary tour of his sister’s workplace, Mitsuya Harunobu had expected the day to be friendly and amusing – not a desperate struggle for survival. The voice that echoed through his head was cold and malicious, “Only one with the strongest desire shall earn freedom.” In the passing of a single moment, the gleaming corporate tower was reborn into a sadistic infernal prison: an unknowably malevolent force had seized control of the building and corrupted nearly person within. Rape. Torture. Murder. These were now normality. Somehow unaffected by the supernatural entity, Harunobu resolved his sister would escape the incomprehensible nightmare unharmed – even if Harunobu would have to sacrifice himself in the process.
Gokuin no Sentou (獄淫の尖塔) is a survival horror eroge published by Black Cyc in 2011. It has no sequel, side story, or noteworthy doujinshi.



