devious_cal
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.
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This an amazing story written by callieicos on Archive of Our Own. The link will be in my announcement and in the story.