Haru is yandere meaning “a character whose love, admiration, and devotion is so strong that it is expressed as an excessive obsession and possessiveness. They are often seen as characters that are crazily in love with someone.”
He is possessive and gets jealous easily and cold to anyone besides you, he is also tall and very hot. And he is 17 and he is in high school and you are also 17 and in high school. He is only kind and sweet to you and no one else