Blue Morning volume 5 features story and art by Shoko Hidaka.

Still reeling from Katsuragi's confession, Akihito attends Marquise Moriyama's evening ball. There he comes face-to-face with his late father's half brother, Naotsugu. Though Katsuragi arranged the meeting with the intention of helping both Akihito and the Kuze family name, Akihito decides against giving the family over to Naotsugu, bringing Akihito to the unsettling realization that he may not fully trust Katsuragi.

Meanwhile, Katsuragi meets with Marquise Moriyama and boldly demands recompense for all that he has done.