Higurashi: When They Cry: Season 1, Episode 12

1 - 12: The Cursed Murder Chapter - Part 4 - Something Lost

Keiichi's mentality is shaken when his friends tells him that he was actually at the Watanagashi Festival with them and Satoko still bemoans her uncle's abuse, despite being sure about having him dead. His confusion grows when he tries to unsuccessfully find the truth.