Looking for the source of this. I know nothing about it, found it in /a/. Not 100% sure this counts as SFW, but seeing as it wasn't deleted on a blue board, I guess it should be okay?
I think it might be Kanojo no Kagi wo Akeru Houhou
>>22490
the father reminds me of Sankarea
>>22608
Thanks, didn't get this far yet but I'm pretty sure that's it.