Cake and Seeiw are very close despite their different personalities. Cake goes abroad, and when he returns, he discovers that Seeiw has changed. Many people appreciate Seeiw and are drawn to him, which makes Cake feel jealous. Cake begins to question his feelings for Seeiw. In addition to the relationship issues, Seeiw must also deal with a family problem. Seeiw’s mother is falling ill, and he later discovers that she has cancer because she was exposed to her husband’s secondhand smoke. For this reason, Seeiw harbors resentment toward his father. However, Cake is always by his side, and together they face all obstacles. Seeiw realizes that Cake isn’t just half of his life—she is his whole life.