Nettlerase: My Wife Was Cuckolded By My Childhood Best Friend Shiori Tsukada

I met my husband at work and we got married. And he... is my husband's childhood friend; the two of them are very close, and they often had meals like this at our home. Honestly. I never thought anything of him at all, but from the day it was somehow decided that I would pretend to be my husband's childhood friend's girlfriend... little by little... the gears... started to go wrong...