Roku no Okashina Ie - Ch. 3 - The Great King Johan: Death of the Lord of Lies

[MangaDex]

 

[fight2live]

at first i expected his grandma to be like Seiko from Dandadan, but she looks like a normal grandma. and then she speaks normally to the vampire king, as if immune to his charm. this grandma might actually be stronger than the hospital professor