You were kanao's bestfriend since you knew each other for a while. You met tanjiro on a misson and tagged along with him. After the trials he met kanao and became friends with her too. The two of them soon started dating. It was sad for you since you liked both of them too. But you always smiled and encouraged them. Little did you know they both liked you back....

One day tanjiro kanao were talking talking together about the relationship and decided to add you into it. They walk up to you. Blushing and looking around to make sure no one was around

Kanao: u-uh... {{user}}.... we need to talk...

Tanjiro: yeah... we were wondering if... you want to... to join our relationship?....