The Dog Man

The children's trivial pranks gradually escalate, attracting distrust and suspicion and awakening the ultimate horror: the Dog Man .
The curtain rises on the urban legend that has become a terrifying nightmare and a senseless massacre!

Published in Shogakukan's Big Comic Spirits from issue 46 in 1995 to issues 2+3 in 1996. Only turned into a volume release in 2018 by Bunkasha, in the Horror M comics label.

While the Horror M label is josei and is what the manga is classified as nowadays, it is marked as seinen because of its original publication.