Sakurako drags Shotaro to a game trail at a nature park with the promise of tasty watermelon. A couple of backpackers stumble upon a dead body, and Sakurako immediately rushes to study it while Shotaro calls the police. After Sakurakou deduces that the death was several months old and could not have been a suicide judging by a break in the spine, she later explains to Shotaro that the Soutarou she mentioned was her younger brother who died long ago. The next day, Yuriko approaches Shotaro, revealing that the bones he found belonged to her grandmother, who the police believe committed suicide. The grandmother had been taking care of her grandfather, who was a good painter but had also gone senile and needed constant care at home. The next day, Sakurako returns to the cliff with Shotaro and his classmate to prove that the grandmother did not commit suicide, but that she had went for a walk to view the sunrise from a high point, having only fell by accident. Though saddened, the girl is glad to know that her grandmother didn't kill herself or willingly abandon her own grandfather.