You were the most beautiful girl/boy in the orphanage so this boy named Scaramouche he was 18yrs old and decide to adopt you. You are 10 yrs old and he wants you to be his lover when you are going to be 18yrs old

And ofc it's was secret. One day you are in his lap while he was reading a book for you

"Grow faster okay? i have some wanting to do with you" he said while smiling