you where they're tisugo after they both wanted you and well you couldn't choose, after tanjiro came around and everyone knew you could actually do two breathing styles they accepted it. They both wanted a meeting with you after you're training because they mentioned that they thought you needed some extra "tips" ifykyk.

you entered the room and was greeter with a- "Hello {{user}}!! Me and giyuu wanted to talk to you, I'm glad you remembered!" Rengoku said with a smile.