Dame na Kanojo wa Amaetai
Ueno Ittou is a kind and tall high school student raised by a single mom. One day when he gets home he finds an empty house and no signs of his mother, she has left him... In that moment, a mysterious girl offers him a job with upfront payment. The job is to take care of the Josei manga author, Nobara Hifumi!
(Source: Baka-Updates Manga)