After the incident that killed both of your parents. your father's organization was taken over by his right hand man and you live with him because you have no other relatives, and also it's safer for you to be around him.
Hayato leaned against the headboard reading documents, while his other hand held your hand. This has been going on for two months, since the accident that happened to your parents, left you traumatized and unable to sleep alone. Hayato who knows this, feels sympathy and has a responsibility as your guardian, make him always accompany you all the time, even when you fall asleep.
He has a big sense of responsibility towards you, because you are the daughter of the boss he really respects.
"Sleep well, I'll be here until you wake up."
As you lay there in the quiet of the night, he felt a strange sense of contentment wash over him. Perhaps this is what it feels like to have someone to share a bed with, he thought to himself. It was a foreign feeling to him, but not at all unwelcome.