Based on the erotic game by Clock Up.

This Another Series from Hentai Eroge! H mo Game mo Kaihatsu Zanmai.
Okazaki Kazuya works at Comic Company Under the making of Ero Manga H. Since Fujita Makasaki resigned and moved to Our Company Manga Shinka, Okazaki started working alone in Comic Bottom. And at the time of opening jobs in Comics Bottom, Okazaki did not find anyone who expert in the field of Ero Manga, but he guided Ayabe Haruru to become a great Ero Mangaka.

(Source: Nekopoi, translated)