Shall we date?: Blood in Roses

Now included in the "Dear Otome" app.
The heroine of the game meets a beautiful and bloodcurdling kind, ‘Vampires’ at the castle connecting the dark world and the human world. One day, she is taken her blood by the vampires. If she fails to find and drink the evening dew from the Rose Garden within ten days, she is told to be turned into a vampire. Nurturing a love with her partner, she struggles to find the Rose Garden somewhere in the castle, and reveal its mystery.