0-ji wo Sugitara Kimi no Mono

Kohinata Kairi, an unsuccessful shonen manga artist who has had his series axed, is advised by his editor to become a shojo manga artist. He tried to refuse, saying that as a "romantic-relationship-virgin" there was no way he could draw a love story, but after he was practically fired, he ended up drawing the story in tears...
At a meeting with his new editor-in-charge, he received a huge criticism about his next work.
To learn the "heart-throb" necessary for shoujo manga, he ends up going to a host club...!

(Source: Comic Fleur, translated)

Note: Includes two extra chapers.