Yamiochi Last Boss Reijou no Osananajimi ni Tensei Shita. Ore ga Shindara Bad End Kakutei nanode Saikyou ni Natta kedo, Mou Yamiochi "Yandere-ka" Shitemasen ka?

I, Arcus Fort, am a reincarnated person. Therefore, I know that this world is the world of the popular otome game "Celestia Kingdom" in the real world. At first, I thought she was just an unknown mob character, but it turns out she is actually a childhood friend of the terrifying final boss lady. If the knowledge from my previous life is correct, then won't my death mean that I will fall into darkness?! I somehow managed to become the strongest without ending up with a bad ending. But something seems strange about her... "Hey, why aren't you looking at me...?" Huh, did I make a mistake on this?