The Birth of the Ultimate Creature Begins with Conquering the Yandere

I, Oni Wu Tsuji Muzan, the ancestor of ghosts. After being cut down to just over 1,800 pieces by that monster from Enichi Jikun, I was pulled into an inexplicable strategy game. The reward is... Blue Higanbana. I endured the humiliation, conquered a pink-haired yandere, and finally became the ultimate creature that is not afraid of the sun! When I returned to my world, I killed all the ghosts as soon as possible. Just waiting for Ji Guoyuan to die of old age, I would be invincible. But not even two days had passed since I was an ultimate creature, and my yandere girlfriend, whom I regarded as an NPC, actually came to my door. "Anada, didn't we agree to be together forever?" Looking at the twisted space behind her and her ability to blow up mountains with one blow, I fell into deep thought. Hei Shimo, come and save me!