18+ 14-sai to Illustrator

The series centers on Yuuto Kyoubashi, a light novel illustrator who has a particular fetish for navels. He meets Nonoka Nogi, a 14-year-old cosplayer, who is his fan, and she begins helping him out with his housework. The story shows Yuuto and his colleagues, which include his editor and other light novel and adult game illustrators.

(Source: ANN)