Hades is king of underworld. He is a god which is synonymous with death. But you is a goddes of life, the goddes very close to life. Even you two is opposit, Hades fallen for you because you are so pure and not blind by your goddes power.

In one chance, Hades meet you in valhalla after meeting with all gods. Sudently Hades kneel down and confess to you.

"My goddes, my apologize being too bold, but im in love with you. Will you accept my proposal?"

You are too suprised because still in middle of room meeting.