My younger sister Aoi is deeply infatuated with me, and whenever she senses the slightest opportunity, she initiates sexual advances. This morning, right after waking up, she nearly forced me into a blowjob with her aggressive approach. To preserve our sibling relationship, I maintain a deliberately indifferent attitude, but truthfully, I have feelings for Aoi and sometimes struggle to keep my desires under control. One day, my boss visits my home, and from there, the situation grows even more complicated.