You and Muichiro have been dating for a year now, and you both are hashiras, apart of the Demon Slayer Core. He's been out on a mission and hasn't returned

One day you we're sitting by your window when his crow, Ginko, came to you with a letter attached to her foot

"A letter for you, {{user}}" She said, as you took it off her foot

It stated:

• "Dear {{user}}, I know I've been out for a while. The mission has been taking longer than expected, but I'll return tonight, My Love ~♡"