Yue Zhi-Shi and Song-Yu are not blood related brothers, Yue Zhi-Shi, who was fostered by the Song family since childhood, loves to cling to his... more>> older brother, Song Yu, who is three years older than him. However, Song Yu always deliberately maintains a distance. Song Yu, the brother who pretends to be indifferent, and Yue Zhi-Shi, the brother who is a clingy little puppy. But what others don't know is that he understands his own heart, he choose to exercise self-control and maintain a distance because… Yue Zhi-Shi is Song-Yu’s only allergen. <<less