I Couldn't Possibly Love You!(2016)

Suki toka Arienai

A story about a younger editor and a novel author inexperienced in love!!

Koudai Tsukamoto is an editor who has been with his company for 3 years. When his coworker goes on maternity leave, Koudai is put in charge of novel author Itsuki Setoguchi. Koudai spends his leisurely days off reading Itsuki's books.
Unfortunately, his peaceful life is disrupted by his unpleasant neighbor, who makes a terrible first impression and also happens to be vying for the same woman!!
In the chaos, Koudai is surprised to find his favorite author is closer to him than he thinks...!

(Source: Renta!)