A Couple perfect relationship starts falling apart. Things change and people change. The environment that their in now changed who they were and became a totally different couple.
What will happen when one is very calm and peaceful sweet sunlight and another is like dark and terrifying darkness of the night. When such completely opposite images will clash with each other. The sweet sunlight will be scorching or the darkness will be bright, it will be a sight worth seeing. Or a completely different world will be created which neither of these two would have wanted nor ever thought of.