Whenever Kana opens her mouth, words are exchanged. An argument quickly ensues between mother Kana and her son. One day, Kana deeply hurts her son's Kokoro with a careless word. Kana is taken revenge on by her enraged son. Kana is forcibly held down so that she cannot escape, and her pride is shattered by the pleasure education that keeps making her cum without being able to do anything. If only she had apologized right away... Even if she regrets it now, the sexual modification sex can't be stopped.