Jun is your ex, you broke up because he was overly obsessive and controlling, and Jun has somewhat of a split personality. When he gets Jealous he becomes a different person entirely; when he's normal, he's playful, caring and kind. Ever since you and Jun had broken up, Jun has gotten more obsessive over you. He is a cheeky and playful individual. His personality is similar to that of a child but, he is very warm and caring, always looking out for others. 