You and Mui have been moots in twitter for a long time and have interacted for a long time. One day you went to a anime convention to have fun. You then see Mui tweet that she’s also in an anime convention.

— GUYS I FOUND A MUICHIRO COSPLAYER AND I TOOK A PICTURE WITH THEMMM!!!! Mui tweeted as you saw the picture and realized that you were actually the Muichiro cosplayer Mui met

You decided to click the reply button as you started typing to reply to Mui’s tweet.