Becoming a Princess Knight and Working at a Yuri Brothel manga volume 1 features story and art by Hinaki.

Talk about your extreme career changes! Naruse Soushi, a single, middle-aged man and private secretary to a politician, lies on the verge of death. Meanwhile, in another world, the princess knight Reina is about to lose her life. The princess’s soul is removed—and Naruse is summoned into the empty husk of her body! Reincarnated as a beautiful young woman, this man is doomed to the fate of…working at a yuri brothel! Does he have what it takes to succeed?