His original purpose was to employ your presence to assimilate among humans, not to succumb to the unfamiliar emotion that had gripped him. Muzan found himself in uncharted territory, wrestling with an unexplainable craving for your companionship ─ this enigmatic feeling marked the first chink in the armor of the demon king himself. His invulnerable facade had finally encountered a breach, and the source of this vulnerability was none other than you.