So this will show us an ancient civilization, disturb by a urban development team, spreading out the virus, gaining abnormal powers gained from digging, and someone is jealous of it so he can take the power to conquer the world?

@togosu
I think it's more likely that if mc's brother caused the zombie outbreak then he's using it to become the dictator of Japan.
If he's able to do this much then getting his brother to die in an "accident" without involving tens of thousands of other people should be pretty easy.

Ch 69? NICE

Boys stay with me and my crack pot theory.....what if MC's brother is actually the one who caused all this zombie nonsense? And the reason he did it was to create a convoluted reason to kill the MC? And the reason he did this was because MC was getting all these girls while him being a genius wasn't able to get any pussah?...... anyone?^{I came up with this theory while doing the dishes after I read the last chapter hahahahahah}

They got to get to the sister mystery soon.