Higurashi no Naku Koro ni - Dai 3-wa: Tatarigoroshi-hen  

ひぐらしのなく頃に 第三話～祟殺し編～

In Tatarigoroshi-hen, Keiichi and Satoko develop a close bond like siblings. When Satokos abusive uncle returns to Hinamizawa, Keiichi tries to help her with extreme measures. However, as more people die, it becomes clear that he is not the only one involved. This time, the focus shifts onto Satoko Houjou being the "victim". Despite his deep passion for protecting Satoko, Keiichi unknowingly turns into a villain in this chapter.