Saikou no Shousetsuka: secret

Kurata, a talented editor whose projects are consistently successful, has a boyfriend: the bestselling author Enjouji Nao, harbors a twisted tendency—after finishing a manuscript, he gets so sexually excited that he’s driven to attack anyone nearby. Kurata has resolved to support Enjoji as both his editor and his partner, accepting this flaw. However, now that he’s labeled as more than "just his editor"—as Enjouji’s boyfriend—Kurata finds himself embarrassed by Enjoji’s handsome looks and voice. To make things even more complicated, he’s now finding Enjoji’s writing arousing as well...!?

(Source: Kaiohsha, translated)

Note: Includes 3 extra chapters.