亜樹 直 Agi Tadashi is a Japanese manga storywriter, novelist and screenwriter. His original name is Shin Kibayashi (樹林 伸 Kibayashi Shin). He was born in 1962 in Tokyo, and graduated from Tokyo Metropolitan Musashi Senior High School and Waseda University School of Economics & Political Science. The penname "Tadashi Agi" is shared with his sister. Under the name Yuma Ando, he received the 2003 Kodansha Manga Award for shōnen for writing Kunimitsu no Matsuri.
Huh… so many unexpected revelations. Secrets underneath the underneath… and then there’s still the question of the identity of , whether it matches what we (were made to?) believe.
THE SETSUGEKKA MURDERS When Kyuu uncovers the secret of Ryuu’s hidden past, it threatens to fracture the bond within Class Q. Amidst this tension, the team is drawn into the “Snow, Moon, Flowers” murders, inspired by the traditional Setsugekka motif. As they investigate, they uncover a cunning plan masterminded by Cerberus, a high-ranking member of the Pluto organization. With their mentor Morihiko Dan involved, the case escalates into a fierce battle of deduction. In a shocking finale, a triple-layered twist reveals the true culprit—someone no one expected—testing not only their intellect but the strength of their friendship.