Mangaka no Akashi-sensei wa Jitsu wa Youkai Deshita.

Overview

Is the bonus of a high-paying job a ghoul-helping? Shinozaki Eita, a university student, has a serious and righteous character, and his part-time job never lasts long. However, one day, he is introduced to a part-time job as a manga assistant, which pays 50,000 yen a day. The employer is a manga artist, Akashi Yosuke. However, in that workplace, strange, unworldly creatures spring up, and youkai come to......ask for help! Eita is surprised, but Akashi is unconcerned. As it turns out, Akashi is actually one of them. A heartwarming story of people and yokai! (Source: Sankosha, translated)

Source: AniList