Love is the chosen emotion in this project.
Love is a strong feeling of affection, attachment, obsession and attraction to others. There are two sides of love. One side is romantic, comfortable and pinky love that we are familiar with and the other side is the shadowy part of love that is twisted, dark and anxious.
The reason why there is dark side of love is that it is built up from previous unpleasant experience and yearning for stable and comfortable relationship with loved ones. That is to say, as people feel love, they are actually experiencing more feelings than just simply satisfying one affectionate emotion.