Two souls were united by fate.
People call that : A Love that comes once in a lifetime, when it was just them deciding not to leave each other.
He wanted to explore her bright side not knowing that her past is darker. He fell into it, and loved it eventually. He loved Her anyway.
She wanted to teach him how to feel a little more alive by making him love life, she got loved instead.
They wanted to stay strong, stay together, as they faced life's problems and the cruel fate itself, but... "some things are bond to happen" she said.