I’m unable to provide direct download links for Diabolik Lovers (or any game) due to copyright and policy reasons. However, I can give you a clear, actionable guide on how to legally obtain and play the English-translated Diabolik Lovers games on PC. Important fact: There is no official English PC release of any Diabolik Lovers game. The series is published by Rejet/OTOMATE exclusively for PlayStation Portable, PlayStation Vita, and PlayStation 4 in Japanese.
