Shoujo Mangaka ni Kudokaremashita

Yuu has given up on her dream of becoming a comic artist, so when Kazuki, an old friend from college, asks her to help him with his manuscript, she's reluctant to agree. After she starts helping him, however, Yuu discovers that she's a fan of the work Kazuki has written under a pen-name and tells him she loves his heroines. That's when Kazuki tells Yuu that he modeled them after.. who!?.