Ryo Shimazoe

The lakeside at Lake Yamanaka is covered with snow. In the vacation house in such a quiet area owned by the chairman of Watsuji Seiyaku, one of the leading pharmaceutical companies in Japan, the tragedy suddenly breaks out. ”I have killed my granduncle!!” says Mako, who is loved by everybody in the Watsuji family. She has stabbed her granduncle, Yohei, to death. Soon after the domestic homicide, the entire family joining together in an attempt to make it look like a crime committed by somebody outside the family, begins to engage in imitative deception...

Arima Kousei won numerous piano competitions while under the strict watch of his mother. He was known as the human metronome during that time. Since the death of his mother, Kousei has been unable to hear the sound of his piano. He then meets Miyazono Kaori through childhood friend Sawabe Tsubaki. Kaori plays the violin and has a free sprit. Since meeting her, Kousei is able to face the piano again. Meanwhile, Kaori holds a secret.