This is a fanfiction about rin and len as a couple so if you prefer them as twins then this is not for you. I do not own vocaloid or the pictures or music, I only own this plot. Rin Kagine is the daughter of a wealthy business man who doesn't let her worry about adult issues like becoming his successor but when he gets remarried her step-mother insists on getting her a butler to teach her how to be a proper lady. Who is this butler and will they get along?