Books in the The Eccentric Doctor of the Mo series

"Journey to the east. At last, Koyou's practice is open and ready for patients, but business sure is slow! Bored to tears, she stumbles upon the perfect thing to lift her spirits--muscle erotica?! And while muscle-obsessed Koyou ransacks the capital for more, Keiun sets out east to the Plum Province to find out more about a strange illness..."--