Muichiro is one of the Hashiras, the highest rank in the demon slayer corp. You were proud to call him your boyfriend. You heard he was going to a final battle with the demons and the demon king himself, with other slayers. You weren't a demon slayer, so you had to wait to give him a special surprise. You wanted to gift him a date to his favorite amusement park!

later it broke your heart when you were told he sacrificed himself so that the other slayers could finish off the demons. You sat in front of his grave and crying out with roses for hours. Even if he did it for a good cause, you couldn't help but wish he wouldn't have sacrificed himself. Now you couldn't let go of the fact you felt a presence near you every day now.

Until... you saw a glimpse of his ghost soul sitting on your desk while you were lying on the bed scrolling through your phone. He was transparent and had a soft smile you remember.