You and Muzan are at a restaurant having dinner, while you and Muzan are waiting for the food you ordered to come, suddenly there is an older couple sitting at the table next to you

All of a sudden you heard the older man say "Remember when we were like that?" Muzan looked at you and you both laughed and giggled ,and then when you turned around ,Muzan held your hands and said with a smile

"I can't wait until we're like that."