Kashi (華師)

Anthology where the heroines get attacked by a variety of "erotic" traps within dungeons.Volume 1 Cover: KashiAuthor list:KashiItou Nanami & OndiShinonome ShinoTakaha MomoToudorimashaYuuki ShinichiVolume 2 Cover: KashiAuthor list:Yokoshima KokatsuMamo WilliamsKuromasa ShiseiYuuki ShinichiTakaha MomoToine & Ondi

The main character, Nitta Kensuke, touches a sword in a storeroom one day and falls unconscious. When he wakes up, he is in the Sengoku ("warring states") period of Japan, except all the historical figures are sexy young girls and the country is under attack by human-eating, blood-drinking demons!

Alternate Story of Hentai Ouji to Warawanai Neko.