The Eccentric Doctor of the Moon Flower Kingdom manga volume 5 features story and art by Tohru Himuka.

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…

The Eccentric Doctor of the Moon Flower Kingdom manga volume 6 features story and art by Tohru Himuka.

Determined to get to the bottom of a mysterious pandemic, Keiun leads a top-secret mission into the neighboring Plum Province to investigate rumors of a “mountain curse” that has already claimed many lives. Discovering it was a contagious disease all along, Keiun also uncovers a scheme to conceal the spreading sickness as well as the Stem Sect’s hidden movements in the shadows. Left with no choice, Keiun uses the last ace left up his sleeve…

The Eccentric Doctor of the Moon Flower Kingdom manga volume 7 features story and art by Tohru Himuka.

At Keiun's urging, Koyou arrives in Plum village, which is being ravaged by a mysterious illness. Unable to figure out the disease's origin or a proper treatment though, the young genius doctor is truly stumped! Could the answer be something simple that's been staring her in the face? Or has Koyou finally met her match? Meanwhile, the Divine Voice's past identity comes to light in the thrilling conclusion to this arc!