Otonari ni Ginga

After the death of his father, Kuga Ichirou, a shoujo mangaka fresh out of high school, has to take care of his two little siblings, Machi and Fumio, all by himself. Struggling to meet a deadline after his previous assistants get their manga debuts, he hires a new assistant through his editor. However, his life takes an unexpected turn after this new assistant is revealed to be a beautiful and mysterious girl… [Official English](https://kodansha.us/series/a-galaxy-next-door/)