I Wanted a 2D Harem Isekai, Got a Rule-Horror Game

Crossing into the 2D world, with both parents dead, money in my pocket, and a place to live. Even if the universe’s ‘no-imouto clause’ is in effect, this still looks like the classic daily-life harem-protagonist trajectory in a 2D world, right? Surely next comes the otaku-bait development, a wonderful story of being surrounded by girls, yes? [Welcome to the “Sacrifice Game.” We wish you the chance to witness the end within true fear.] Wait a sec— This script isn’t right, is it? Corpses whispering, shadowed pits creeping, paper effigies asking for directions, a cursed village’s night patrol, an eye peering from under the bed… Grotesque rules weave a blood-stained net; there is no escape. Only by facing the endless nightmare head-on can one fight for a sliver of life. So, since I’m being entangled by all these horrors, can I get a system? Preferably the kind that becomes overpowered just by checking in! While I was thinking that, I realized I’d gotten the ability to roll back after death. It sure is a cheat—but doesn’t that mean I have to keep betting my life on trial and error? I refuse! I don’t want to be a Subaru-style, die-and-retry protagonist! Someone save me, please! Then I turned around and saw the girls trapped with me: Shinomiya Kaguya, Fujiwara Chika, Gotō Hitori, Yotsuya Miko, and others. Damn it, then bring it on! How could I let beautiful girls be sacrificed in a place like this? I’ll create a happy world—no Urobuchi-style tragedy and no grimdark despair! .... This is a translation of a Chinese Novel, with minor changes in some parts of the original story.