Such a cute read! I loved the chemistry between Charlie and Gretchen, and the spicy scenes were so fun. I do wish Gretchen's father had made some comeback, if only for a "realizing the villain has no hold on me anymore" monologue from Gretchen. Gretchen herself was such a cool character, I loved her so much. I do wish Charlie had a slightly more robust personality, but I think it's just my love of duo POV's coming out. I do still like Charlie! 
The narrator was good, too!