Mitsuo finds small happiness by meeting with his brother Yuta and his niece Chie. The next day, Mitsuo takes Chie and his other niece Itsuki to an amusement park. However, Chie kills Itsuki by dropping her on the ground while Mitsuo takes his eyes off them. When Chie and Itsuki's mother, Yoko questions Mitsuo and Chie for the truth, Chie suddenly lies that "Uncle Mitsuo dropped Itsuki."
Although Mitsuo makes a false confession in order to protect Chie, Itsuki's death is dealt as an accident for lack of evidence. Mitsuo gets isolated from the society, and devotes himself solely to praying for Itsuki by sowing sunflower seeds. Also Chie is agitated to see Mitsuo sowing.The family goes through a misfortune of being broken up. Meanwhile, sunflower seeds are going to sprout quietly.