The tale of Persephone has a lot of similarities to myths surrounding Adonis, Aphrodite's (a.k.a. Venus) hunky lover. In some stories, Adonis had to spend part of the year in the underworld and part of the year above, which once again represents the seasons. Interestingly though, it's Persephone herself who demands that the dreamy Adonis be with her in the realm of the dead part of the time, instead of letting him live year round with his true love, Aphrodite.
For much more on this, check out our guide to "Venus and Adonis."