Okashi na Akuyaku Reijou wa Botsurakugo ni Amatou no Ouji ni Karamareru you ni Narimashita

Rena, the daughter of a count, remembers her memories from her past life as an aspiring confectioner and realizes that she has been reincarnated as the villainous young lady in the world of an otome game she was obsessed with in her previous life. Her engagement is broken off, and she is abandoned by her family and becomes a commoner, but she opens the sweets shop of her past life's dream on the outskirts of the royal capital, and a second life full of hope begins.

Then, on the first day of opening, a handsome silver-haired young man enters the deserted shop, and an encounter with him changes Rena's life dramatically...

(Source: Jitsugyou no Nihonsha, translated)