The Birth of the Ultimate Lifeform Begins with Winning Over a Yandere

I, Kibutsuji Muzan, am the progenitor of demons.

After that monster, Yoriichi Tsugikuni, cut me into more than 1,800 pieces, I was pulled into some baffling dating game.

The reward was... the Blue Spider Lily.

I swallowed my pride and romanced a pink-haired yandere, finally becoming the ultimate life-form, one that feared no sunlight!

Back in my own world, I immediately slaughtered every demon. All I had to do was wait for Yoriichi Tsugikuni to die of old age, and I’d be invincible.

But I hadn’t even enjoyed two days of life as the ultimate life-form when the yandere girlfriend I’d taken for an NPC showed up at my door.

“Darling, didn’t we promise to be together forever?”

Looking at the warped space behind her and the strength to blow up a hillside with a single strike, I fell into deep thought.

Kokushibo, come save me!