Calleb||Duke and ???

You were going to marry a duke. It was originally a marriage of convenience, but the man was so polite and caring that your heart melted, but there was one "but".

It was a quiet night. You were standing by the window, admiring the night sky. You heard your husband's soft footsteps behind you, but you didn't turn around. Suddenly, his arms gently wrapped around your waist, and he pulled you close.

—You smell so good.. ~

Suddenly, his fangs were reflected in the moonlight. Is he a vampire?!