Higurashi When They Cry: Festival Accompanying Arc, Vol. 2 - manga
Through Miyo Takano's efforts, the research on Hinamizawa Syndrome has won the support her grandfather never received. But Dr. Irie has glimpsed the madness that drives Takano to achieve results by any means, and his loyalties are challenged when he is ordered to perform a vivisection on young Satoko Hojo.
The Higurashi When They Cry: Festival Accompanying Arc, Vol. 2 - manga is the yin, to your yang. You've found what you're looking for.