吸血鬼とショコラティエ　〜天才錬金術師の甘美な探究〜 (Associated Names)

Alfred, an alchemist, has been thrown out by an old friend and driven out of his workshop. Wandering the streets at night, he met a beautiful nobleman who offered him a chocolate drink. Alfred took notice of the well-off young man and tried to get close to him, but… The nobleman turned out to be…