A stepsister who suddenly appeared due to parents' remarriage. A shy girl who can't express her own opinions, a weak girl who can't clearly say what she dislikes. If you keep teasing your stepsister every day, your sensitivity will skyrocket to the point where you can't live without it. Eventually, she'll come to me on her own. A girl who used to be so shy that she couldn't even express her own opinions will end up asking me to touch her nipples with her own mouth.
