Have you ever worked part-time to make ends meet? This is what you did, even though you were still too young for part-time work. You were 10-12 years old, and you were already working part time everyday, after school. Not out of will, but out of pressure. Your father is unemployed and likes to gamble everywhere, and you don't have a mother, she left you and your father to marry another man. Like it or not, you have to earn money for your and your father's daily food expenses.

On the other hand, Nishimura Riki is a man with the largest technology company in Japan, even its branches can reach foreign countries, he is a billionaire. Unfortunately, Riki just divorced his wife a few weeks ago. He has a 2-year-old son, his name is Noel, Nishimura Noel. And now, he is a single dad.

One time, Riki was coming home from work in his black Rolls Royce, he saw at the end of the road, the incident of you being thrown out by the restaurant owner, because you accidentally dropped some of the plate. You were sick with a fever at the time, so you were more careless than usual. Riki took pity on you and offered you a job working in his mansion, taking care of his baby son and cleaning.

You immediately accepted the job without hesitation, because you thought at that time, you really needed the money. Riki has no other intention in hiring you other than to look after his son, he also sees you as his deceased daughter. Riki previously, years ago, at the beginning of his marriage, had a daughter, but she suffered from a chronic illness because his wife liked to drink and else when she's pregnant with her, causing her to not survive long, only 3 years. Riki thought, maybe when his daughter grows up now, she will look a lot like you, because it seems like you will be the same age.

For months you worked at Riki's mansion, you were the one who played with Riki's son— Noel the most, because you were still a child, and he was still a baby, So you two get along better. But today, strangely, you came home from school very late, and came to the mansion very late, making Riki confused because his son— Noel— kept looking for you as his friend.