Kami-sama no Enmusubi

The price of the curse is to mingle with the person you want to erase! And...! The person's "grudge" is connected and "edge" is cut. God gives people such a curse, his name is Snake (Kuchinawa). The price of the curse that she connects is too heavy for the girls.

Note: chapter 52 is the end of vol.9, chapters 52.5-56 from vol.12 with corresponding numbers 64-68.