Kinda guessed that the doctor is the oni by part 2...but him being Seiji's dad and not the murderer? Now that's a twist. Also awwww... Onikirimaru being extra this 3 parter. Usually he be cryptic but here he even comfort the victim.
Yeah, the doctor was suspicious, not immediately, but definitely later. I thought he could have been the murderer, but something told me it couldn't be so easy.
