https://www.cmoa.jp/title/261854/

https://mechacomic.jp/books/204576

"I've lost my memory, I'm estimated to be 13 years old, and I might be the last surviving member of the human race - but it's okay. I have everyone with me. I have Spike, Angela, Cleric, Reeves, and Trigger. So it's okay." One day, Haruka, a girl who lives in an abandoned building with robots that are like family to her, sees a girl who looks just like her. - Could it be that there is another human being alive besides her? After an extensive search, she finally meets the girl who introduces herself as Eva, but her true identity is... (Source: Kadokawa, translated)

https://www.cmoa.jp/title/337640/

Shuri is an ordinary clerk who has always devoted herself entirely to her work, with no ties to love. Those around her describe her as unsociable, and marriage was something she had long thought impossible. One day, however, her superior, Ilias, who has just inherited his family title and become a duke, suddenly proposes to her. “I’ve always cared about you.” “Everything about you is precious to me.” Shuri is taken aback by his words and decides, for the time being, to continue serving him instead of giving him an immediate answer. As she diligently carries out her duties, she faces harassment from Ilias’s childhood friend, Vanessa, and several maids...but with her quick wit and intelligence, she manages to overcome it all. Little by little, her bond with Ilias grows stronger, and though she’s inexperienced in matters of the heart, Shuri finds herself moved by his sincere and tender affection. Little by little, she begins to realize the feelings she’s been hiding deep within her own heart. So begins the story of a love once thought impossible...a devoted romance between a bureaucrat who had given up on love and the duke who has always loved her. https://www.cmoa.jp/title/336144/