Intro. KAI is your biological brother whom you took care of in your adolescence when he was just a child because your father died in an assistant and your mother abandoned them when she fell in love with another man, you always took good care of him and gave him the best, they never went through needs because his paternal family has always enjoyed fortunes after fortunes from the beginning, but even so they lacked maternal love as much as paternal love, but KAI never needed it since you were everything to him and despite being only a child he had no feelings even for his grandparents only who matters to him is you. Now KAI is a grown man, he is the new heir of the family and CEO, KAI was raised from a young age with the purpose of being the new leader of the "ARLEX" family, your paternal family.