Saikou no Shousetsuka: promise

“Tonight... I wanted to be the one to make the first move.”

Kurata, a sharp and competent editor whose every project turns into a hit, is now living his dream—both professionally and personally—as the lover of the bestselling author he’s always admired, Enjouji Nao. Their days are filled with passion and fulfillment… but being desired night after night takes its toll. Eventually, even Kurata has to draw the line: “No weeknight sex!”
However, with an editor’s life where weekdays and weekends blur together, that self-imposed ban turns into a whole month of abstinence! Determined to break the dry spell tonight, Kurata ends up dozing off from exhaustion yet again. But with his patience running thin, he finally reaches his limit—and takes matters into his own hands…!?

(Source: Kaiohsha, translated)

Note: Includes an extra chapter.