Inu wa Maibyou Koi wo suru

Cute college student Atsushi (a.k.a. Atsu) is distracting his lover Yoritomo, a popular erotica writer. Yoritomo has to decide what to write next in his best-selling series, but all he can think about is Atsu's IOU promising Yoritomo to "do anything you want"...! Even while meeting with his editor, Yoritomo can only fantasize about Atsu dressed as a nurse or a pop star. Work can't get done like this! At the same time, his younger brother Katsuyori is agonizing over love for the first time in his life!

(Source: Renta!)