Bokunchi no Maid-san-tachi.

Shota Hinata is an ordinary boy. He lives with his personal maid, Arisa Kurotsubaki. She is a smart, beautiful, and perfect in every way. She works mysteriously with absolutely zero expression on her face. However, she likes to tease Shota at every opportunity, and even tries to serve him in naughty ways! Shota, who is in love with Arisa, tries to maintain his manly dignity in order to prove worthy of her... But can Shota stand up to his very thirsty maid?
(Source: Comic Gamma Plus, translated)
Note: Chapter count includes three bonus chapters.