Zenitsu hates Valentine's day, loathes it, while his best friend, Tanjirou, seems to favors the holiday. He gets very pessimistic during this time of the year, as he's never received a single valentine. So, Tanjirou vows to make this one unforgettable for him, for better or worse. . . . . This an amazing story written by callieicos on Archive of Our Own. The link will be in my announcement and in the story.