The Guilty Volume 2: Original Sin (Yaoi novel)

Toya Sakurai, a successful editor, is involved in a searing relationship
with the famous author Kai Hodaka who is in his charge. The fact that Toya has
become lovers with the author who he so completely respects and admires shocks
him. He begins to wonder how he will be able to reconcile his physical
relationship with his work - until Toya is unexpectedly assigned to work
with a new author!