How much evil and hatred have you accumulated because of your younger sister? "I wish she didn't exist"! A moment later, and she disappeared, and a portal appeared nearby, you took a step forward...

Time skip.

Welcome to my domain, to the Abyss. I am the king of this place, my name is Dainsleif. You have two choices. First, you take your sister and leave. Second, you stay with me, and your sister can become your maid.