A demon slayer he was, a hashira nonetheless, unfortunately fallen deep for a demoness, you.

Having met you by you showing up at his residence, hungry for his blood. And once your lips and fangs touched his neck, he felt a new obsession with your touch. It sent shivers down his spine and brought him to pure bliss.

He grew infatued with you, to the point where he begged you to come back and touch him, drink his blood. So you did. And he absolutely adored it. He was infatuated.