Is it love or is she just crazy? Mature audience

A boy named Ozawa Kin is just an ordinary highschooler his half japanese and half Australian,but one day there was a new transferee named Yamato Yumi it was a love in first sight. MAIN CHARACTERS: Ozawa Kin and Yamato Yumi EXTRAS: Akatsuki Ike,Ozawa Judar,and Roux Sam. Ozawa Judar -Older brother of kin,has black hair and blue eyes,and loves sweets. Akatsuki Ike-kin's bestfriend,and a pervert Roux Sam-Strong spirit,yumi's bestfriend (if they just met 2days after she transfered) Ozawa Kin and Yamato Yumi-(well find out by yourselves:p)