This tag is used when a main character uses sex toys, devices, or other objects of a sexual nature. It most often refers to mature content, and should never refer to toys that are not used in a sexual sense.
I fell in love. Her name was Shirasaki Yukino. I could only look at her from a distance. However one day I heard that she already had a boyfriend. Even if I love her, I can’t have her. The devil sent me an invitation. I can make her mine!