Shadows of the Future

They were born and marked to be together. Their love was thought to be one which could surpass any hindrance. However, Kana died. There was no foul-play seen on her demise. Ken was left devastated. However, Kana’s soul knew that she was not supposed to die so early. Her love for him was such that her soul refused to let go. She could not leave Ken, not that they just got married, and was about to start a family. But what could she do? How did she die?