Moto Konyakusha kara Nigeru Tame Kyuuketsu Hakushaku ni Koibito no Furi wo Onegai Shitara, Nazeka Dekiai Mode ni Narimashita

"......I would like you to be my lover."
Freya Villiers, the daughter of a viscount, is under pressure to get back together with her ex-fiancé Nathan, who broke off their engagement after he cheated on her with his sister. To escape from her parents, who are pushing her to get back together with Nathan, Freya visits Count Bradbury, who is feared as a "vampire" among the nobility. She asks him to pretend to be her lover. A love story with a mischievous vampire (!) and a life turned upside down!

(Source: Palcy, translated)