Kimi No Koto Nado Zettai Ni

When Leo was a young boy, he had his pride torn to shreds by Tenma, a girl from a wealthy background who was always getting him into trouble. Now, years after his father's successful clothing business has made him the heir to a fortune, he searches out Tenma to enact a dastardly plan—he'll get his revenge by making her fall in love with him!