Higurashi no Naku Koro ni

Synopsis

Keiichi decides that he must kill Teppei. He asks Mion to take Satoko to the Watanagashi festival. When she asks him why he tells her he has some things to do. Mion mentions that is exactly what Satoshi said and did before he disappeared. Keiichii concludes that Satoshi must have killed his aunt to protect Satoko and that he must do the same. He beats Teppei to death with Satoshi's baseball bat and buries the body. On his way back home, Keiichi bumps into Takano, who appears to know of the murder he committed when she asks him if he buried the body. (Source: Wikipedia)