They're not Kissing and a Cat

Hee-Yul Yoon has just moved back from America to Korea with her sister, Suh Hee Yoon. She is determined to deal with her hard past by leaving behind her aunt, uncle and her friend Ricky Ha. After buying a pack of cigarettes she bumps into a handsome boy. And then all of a sudden he kisses her! Who is this annoying bastard and what's his deal?! You had better believe that our heroine Hee-Yul will get to the bottom of this!
(Source: Lunar Ageha Scans)