Catalyst Series by S.L. Armstrong, K. Piet

After a near-fatal accident, Logan Walker seeks help to control the compulsive blood fetish that almost cost his submissive's life. Help happens to be in the form of an athletic, smart psychologist by the name of Dr. Kasper Bromley. Kasper, though, soon finds himself swept up in the fantasies Logan came to him to control. Reluctantly throwing his ethics to the wind, Kasper submits himself to Logan, gambling his career, his future, and his heart on this intriguing man and the lifestyle he offers... moreAfter a near-fatal accident, Logan Walker seeks help to control the compulsive blood fetish that almost cost his submissive's life. Help happens to be in the form of an athletic, smart psychologist by the name of Dr. Kasper Bromley. Kasper, though, soon finds himself swept up in the fantasies Logan came to him to control. Reluctantly throwing his ethics to the wind, Kasper submits himself to Logan, gambling his career, his future, and his heart on this intriguing man and the lifestyle he offers. But when Kasper's desires outpace Logan's, the young doctor is swept down into a whirlpool of sex and sadism that even Logan's love may not be enough to rescue him from. less

Valentine's Day five years after the events of "Catalyst", Logan sets to making it a memorable day for Kasper. He has everything he needs: dinner, flowers, chocolates, and a playroom eagerly waiting for them to play Doctor.