Heimin no Watashi desu ga Koushaku Reijou-sama wo Taburakashite Ikiteimasu

Lilah, a commoner, is kicked out of the house she grew up in and ends up homeless. But for some reason, Eva, the daughter of a duke, takes a liking to her, and Lilah ends up becoming her bodyguard!? So begins a fantasy about an upstart commoner who clashes with nobility!

(Source: Kadokawa, translated)