There Is No Emotion in the Manga, I Rely on Killing Feedback to Become a God

The protagonist Gu Yuan travels to the world of "Spell Return" 14 days before the Shibuya Incident, binds the war sandbox system, and obtains deduction simulation, The four major abilities are deconstruction of spells, purification of murderous intent, and penetration of weaknesses. He acts with absolute rationality, and yet he moves forward step by step without the power of magic - Fu Killing the tiger stick Hisahito to seize Su Nuo's finger, sneaking into Kamo's house to reveal the truth twenty years ago, and forming a hunting combination with Kamo Ruri to sweep across Tokyo Curse. When a mysterious coin appears as a cross-world anchor, he steps into the infinite city of "Demon Slayer: Kimetsu no Yaiba" to hunt the ghosts on the string , deconstructing the art of blood ghosts and proving the Tao through killing.