My Overbearing Senior Sister

In order to be able to settle down in the cruel flood, we must not care cause and effect, kill people and raise ash. And don't exceed the level of challenge, establish the harem. Sister! Do you need to blast him three times with a curse when he's just a foundarian?! Sister! I'm just scratching a little skin, don't feed me nine rotations of gold to get blood! Sister, please don't pretend to be cute newbie.