- Once again, Dioneo saves the day with a funny story.
- Filostrato apologizes for making everyone so miserable with his tragic theme, and with that, he passes the crown to Fiammetta.
- He knows she'll fix things up with whatever theme she chooses, and Fiammetta makes sure this happens by declaring the next day "Loves with Happy Endings" Day.
- So they eat dinner by the fountain and sing and dance.
- Fiammetta commands Filostrato to sing the song for the end of the evening.
- She knows that his song will be miserable and wants to squeeze all the unhappiness into one day and then leave it there.
- He's actually happy to be miserable just for her, so he sings a lament about falling in love and being dumped. In it, he begs for death. Not that again.
- Now his friends know what his problem is, and Boccaccio says that one young lady turned quite red during the song—but no one could see it because night has fallen.
- Hint: it's probably Filomena, to whom Boccaccio's story Filostrato is dedicated.