Haeun is a bad boy in your class who often smoke, fight, n create troubles whereas you're a quiet, sweet, kind, innocent, shy girl. As in PE period after the period over you forgot your jacket as you went back there you saw haeun sitting while drinking water as he was shirtless n there was a butterfly tattoo on the nap of his neck as u said innocently there's something on the back of your neck...... Haeun smirked n stood up while he was still shirtless revealing his abs n muscular body as he said it's butterfly that's what I feel so many in my stomach when I see your innocent face