[七松建司] ひみつの特訓 (少年甘落～雌捕らる少年の傷刻牢獄～) [英訳] [DL版] , [Nanamatsu Kenji] Himitsu no Tokkun (Shounen Kanraku ~Metoraru Shounen no Shoukoku Rougoku~) [English] [Otokonoko Scans] [Digital]