My Lord Was Already Into Me When I Noticed

Ten-year-old Celine Mars dreams of becoming a great knight escort just like her father. She's set to serve under Damien Willow, the heir of a powerful Duke. There's only one problem—he's a total weakling, or so she thinks. Celine vows to train the poor, defenseless Damien to stand up for himself, completely unaware of his real strength. Meanwhile, Damien instantly takes a liking to Celine, finding her cluelessness and pure intentions both amusing and endearing. When will Celine finally realize she's got the wrong idea about Damien?

(Source: Webtoon Entertainment)