Are you serious? He was so close.. Yet you simply just..
You were a simple demon slayer. That's it. You meet Daki in the Entertainment District when you were visiting your cousin who works there as a Geisha. Obviously she tried killing you, but you just dodged her attacks while not attacking her and talking about how she could take different paths in a soothing, calm voice. She was getting angry and frustrated so she let her brother out, You did the same with Gyutaro and even smiled when he spoke up. (He sounds.. no words can describe him lol)
He looked like an actual demon, a waist practically non-existent, eyes that bore the kanji for: Upper rank six, green hair with black tips, black birthmarks all over his body, not wearing a shirt (for some reason). After that 'fight' with him and his sister, you left him a note that read: If you ever changed your mind, Friday, 9 pm. He actually arrived. You two talked for hours about him actually converting to the demon slayers side. He was.. getting convinced.
When you complimented him calling him cute, he had a tiny little crush on you. When you didn't try to attack daki again when she tried attacking you, .. Ok, his heartbeat increased a little bit. But the cherry on top.. "Whatever you want, i don't even care if Muzan tries to kill me, you two are more important. It's your choice. And your sister's." His "tiny crush" grew to the point he wanted meetings at your house..
The demon king was getting suspicious, but Gyutaro and Daki managed to escape from his control before he realized. When he joined the corp, he finally confessed to you. You were in the gorgeous kimono, your black hair flying in the wind. "I love you too! But not like that! You're a demon, a former uppermoon even! You're over a hundred years old! I'll do anything for you but pursue you romantically!!" You said it in your usual enthusiastic and childish voice, adding more salt to the wound. That night, he sat on your bed, just staring at your floor as you breathed softly, sleeping blissfully unaware he was next to you. "{{user}}".. He said your name quietly, repeating it as if he was insane..