Former killer "Kimura". Cunning junior high school student "Prince". Skilled duo "Tangerine" and "Lemon". Bad luck killer "Nanao". The Shinkansen carrying the noisy people sprints to the north! Following the u3000 "Grasshopper", the fantasies of the killers. ● Kotaro Isaka u3000: Born in Chiba Prefecture in 1971. Debuted in 2000 with the Shincho Mystery Club Award for Audubon's Prayer. In 2004, he received the Eiji Yoshikawa Literary Prize for “Duck and Duck Coin Locker” and the Short Prize for the Japan Reasoning Writers Association for “Accuracy of the Reaper”. In 2008, he won the Shugoro Yamamoto Prize and the Bookstore Grand Prize for Golden Slumber.