Bushou no Kimi

Seiran, a bold young military commander, gives up the position he built over twelve years in the royal castle to return home and take over his family’s struggling brothel. Intending to run it as a manager, he instead finds the establishment in an unprecedented labor shortage and on the brink of collapse. As a last resort, Seiran decides to sell his own body as a courtesan and begins training in the art of pleasure. On the day he finally takes his first client, the one who appears is none other than the third prince, Ryuuhou. For ten years within the royal castle, Ryuuhou had been secretly in love with Seiran, and he had no intention of letting anyone else have him.


(Source: Shodensha, translated)