Mikiito Chinen's "Real Face"

Dr. Hiiragi is a genius plastic surgeon who takes on any request as long as the price is right. However, he receives strange requests like, "I want you to change my current wife's face to my ex-wife's face" and "I want you to change this man's face to someone completely different." Around the same time, a series of murders involving "beautiful women who've had plastic surgery" begins to occur... It's a collection of short stories, but as expected from Mikiito Chinen, the way the plot threads are tied up and the twists are amazing. Highly recommended.