Jukkakukan no Satsujin (2024)

Other name: 十角館の殺人 / The Decagon House Murders

Synopsis: The Decagonal Building has been shrouded in mystery since the sudden death of its owner, Nakamura Seiji, six months ago. Now, seven members of the University’s mystery research group have ventured to the isolated Tsunojima Island, where the building is located, for a training camp. However, their plans are disrupted when Kawaminami Takaaki, a former club member, receives a letter from the supposedly deceased Nakamura. With the help of Shimada Kiyoshi, they set out to uncover the truth behind the enigma of Tsunojima.
Amidst their investigation, a member of the group is found dead at the Decagon, further deepening the mystery. Trapped on the island for a week, the remaining members are left in a state of confusion and suspicion towards each other. Is there a connection between the two deaths? Based on the novel “The Decagon House Murders” by Ayatsuji Yukito, this five-