Hey lovely!
Not a dumb question at all dear. No such thing as a dumb question.
Basically a really poor summary I can give you is this myth/concept:
Hades and Persephone are both God/Goddess that come from Greek Mythology.
Hades is King of the Underworld and rules the realm of the dead.
Persephone is Goddess of Spring who later becomes the Queen of the Underworld when Hades basically kidnaps her, and makes her his Queen.
Persephone was said to be very beautiful and attracted Hades with her light and kindness (she liked to dance in fields of flowers and all that disney shit).
Persephone’s mother Demeter tried to get her daughter back by refusing to let harvest season come to mortal realm, and killing a bunch of people. At this point Zeus had no choice but to tell Hades to give Persephone back. But Hades did not want to part with her and tricked her into eating pomegranate seeds (the rule is that you must NEVER eat anything from the Underworld or your soul becomes bound to it). Bargain was then made that Persephone would stay in the Underworld for half the year (autumn & winter) and spring would be allowed to come when she returns to the word above.
Basically the reason we have the rotation of seasons is because needy husband of darkness and decay itself gets his soft wife back home :’))
Essentially Hades x Persephone is one of the most badass, ruthless couples in existence and I love them. Light and Dark balance especially.
Don’t be too quick to write Persephone off as an innocent flower or a victim. Persephone was an absolute badass, and was very much feared and respected. To a point her name was forbidden to speak because she was regarded as Dread Queen, and both gods and mortals alike actually feared her more than Hades himself.