Why Did My 2D Isekai Turn Into a Bizarre Horror Story?

Traveling to the second dimension, with both parents deceased, owning wealth and a house.Although the Cat Guest's rules prohibit having a sister, this is clearly the trajectory of a main character in a typical daily-life harem story.Surely next comes the charming development, surrounded by girls in a wonderful story, right?[Welcome to the "Sacrifice Game." We wish you to witness the end in true terror.]Wait a second,Isn't this script wrong?Corpse whisperings, creeping shadows, paper figures asking the way, eerie village night tours, eyes peering from under the bed...Bizarre rules weave bloodshed, inescapable, only facing the endless nightmare offers a glimmer of hope.So being entangled by these horrors, could I get a system, preferably one where just signing in makes you formidable?While thinking this, I realized I had obtained the ability to revert after death.It's truly a cheat code, but does that mean I must repeatedly risk my life to learn? No, I don’t want to be the kind of protagonist like 486! Someone save me, please!Then I turned around and saw the girls Kaguya Shinomiya, Chika Fujiwara, Hitori Gotou, and Miko Yotsuya trapped with me.Damn it, let's go! How can we let beautiful girls sacrifice themselves in such a place? I want to create a happy world without Urobuchi and "Keima" brothers!