Diamond Tiara, in the spirit of the holiday, decides to spread a little love on Hearts and Hooves Day. She goes about this by writing and delivering a letter to Snails that is meant to look like a confession of Apple Bloom's secret (nonexistent) crush on him. She reasons that Snails will feel inclined to respond to the letter through an expression of his own "love", embarrassing both himself and Apple Bloom. And that's exactly what happens.