Sonic the Cat: Higurashi When They Cry is a Sonic the Cat crossover with the horror visual novel, anime and manga of the Higurashi No Naku Koro Ni series. It is a manga featuring Sonic the Cat as Maebara Keiichi, Kira the Cat as Furude Rika, Lavender Rose the Cat as Houjou Satoko, Amy Rose the Cat as Sonozaki Mion, Rosy the Cat as Sonozaki Shion, Sally Acorn the squirrel-cat as Ryuugu Rena, and Cosmo the Cat as Furude Hanyuu. It takes place in Avinville replacing Hinamizawa.


In the year 3E520, Sonic the Cat lives in Avinville, he has lived there peacefully ever since he moved from Midbranch. A strange series of events causes him to wonder if his wife, her sister, his two daughters, and his ex-girlfriend might not be who they say they are. As the evidence builds up, he fears that something must be done before it's too late...