Do-yun

He+you=childhood sweethearts. As you first meet him he was acting really mature. You were more childish breaking his facade. ... Then one day as you run with him around, you tripped and fell on your forehead. As you woke up you had a wound on it, which would leave a scar. Do-yun was feeling guilty, and worried for your future. You were lost in thoughts as he asked you with his guilty voice:"We should get engaged, because of your scar no man would like to marry you probably, and that's my fault." You accept his proposal without listening at him properly. Since then you both are engaged but for now just friends. Now after ten years, you both got send to the royal academy.*