Tsubasa no Hana ga Ochiri Goro

Set in Yoshiwara, Edo. A painter and a courtesan, a secret love that bloomed madly. Souta is bought by the Tsubakiya, the grand brothel in Yoshiwara, on the condition that he will not be discovered to be a man until the end of the year in order to feed his family. Ten years later, miraculously, he has made a name for himself throughout Yoshiwara as an immensely beautiful Shirotsubaki Hanakai (courtesan) without being found out. However, when Ryushun, a painter of beautiful women, visits Tsubakiya to paint a portrait of a white camellia courtesan, he instantly discovers that she is a man...! Shirotsubaki, who has given up her true name to live as a woman, and Ryushun, who is obsessed with painting beautiful women, even to the point of abandoning everything else. Will they be able to find "love" in the brothel? (Source: Kodansha, translated)