12% is the probability that the person we love, loves us back. Cake and See-ew are close despite their different personalities. Cake goes abroad and when he comes back, he finds out that See-ew has changed. Many people like and approach See-ew and that makes Cake feel jealous. Cake begins to question his feeling for See-ew. Apart from the relationship issue, See-ew also faces a family problem. See-ew’s mom is getting sick and he later finds out that she has cancer as she was exposed to secondhand smoke from her husband. See-ew hold grudges against his dad for that reason. However, Cake is always there beside him and goes through all the obstacles together. See-ew realizes that Cake is more than a half of his life but he is actually his whole life.