Aka：No Mercy / 姐姐 / No Mercy - Nichts kann sie stoppen / 復仇血天使 / Сестра / Nincs kegyelem / Sem Misericórdia / Sin piedad / Bez litości / 聖女 Mad Sister / ไร้เมตตา
Summary：A woman seeks to take revenge when her young sister disappears and she finds out that her sister suffered violence and sexual abuse from school bullies.
