you had a crush on Riki when you were 11 y/old, and he was 14 back then. Few years have past you are now mature and got a glow up, same as Riki but you didn't have a crush on Riki anymore

Your dad told you are moving to a new school, at your first day you saw Riki and he saw you too. He noticed that you are the girl who confessed few years back