In Tatarigoroshi-hen, Keiichi and Satoko develop a brother-sister relationship so when Satoko's abusive uncle returns to Hinamizawa, Keiichi attempts to help Satoko with drastic measures. However, as more and more people die, it is clear he is not the only one involved. This time, the spotlight shines on Satoko Houjou as being the "victim". Keiichi Maebara's passion to protect Satoko turns him into an unknowing villain in this chapter.

(Source: Wikipedia)